Hacker Newsnew | past | comments | ask | show | jobs | submitlogin

This seems to be a global phenomenon.

https://rbej.biomedcentral.com/articles/10.1186/s12958-020-0...

Possible toxicity of something that we deem safe could be an explanation.

A side comment. I am 42. When I was younger, in the late 90s, getting into physical fight was much more common than today. These days even drunk young guys seem to be content with hurling a few insults. (For record, I am a peaceful person and the possibility of getting beaten up for no good reason was something I definitely did not look forward to during my old pub crawls.)

I wonder if this is actually a manifestation of population-wide testosterone drop.



"Possible toxicity of something that we deem safe could be an explanation."

This is a needlessly complex explanation.

Very low physical activity rates are the likely cause.

A majority of men in the US are obese or overweight[1] and, culturally, Americans barely even walk.

Testosterone levels are linked to physical activity.[2][3]

[1] https://en.wikipedia.org/wiki/Obesity_in_the_United_States#P...

[2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4706091/

[3] https://www.cpandr.co.uk/2018/08/22/the-impact-exercise-has-...


I think America is one of the most obese countries on earth.

I completely blame the food. Even eating absolute junk in Europe I noticed I lost 5 or 6 pounds over 2 weeks.

Here if I eat junk food for 3 days my weight jumps by 7 pounds. I am a bit dismayed with all the attempts to normalize obesity in the US. I was morbidly obese up until I got serious about my weight in my early 20s. You can read all the dating books you want, but getting in shape is the only thing that works. It's much easier to hop on Reddit and complain though.

I'm very optimistic I'll be able to move to a healthier country once I retire at 40 or so. Not exactly easy to stay in shape when this country tries to pump us all full of corn syrup


"I completely blame the food. Even eating absolute junk in Europe I noticed I lost 5 or 6 pounds over 2 weeks."

I don't. Certainly it doesn't help and, of course, Americans should eat much better than they do, but ...

I think the most important factor is that our built and cultural environment are constructed to make us obese.

If one does not live in a modern city center one barely ever walks. Most Americans sit all day - at a desk or in a car.

Further, many Americans are 1-2 generations removed from "the farm" and are still heavily influenced by habits like "three square meals per day" that made great sense on the farm and make no sense at all in the city.

We're bad at being urban.

I contrast us with people I see who are good at being urban. The old Chinese women in the park doing Tai Chi every morning. The 70+ woman I saw running (running!) to get the bus in Zurich. The Spanish people I lived with who sort-of ate one big meal every day at 14:00 ...

We'll get there ...


It really is the food. America was as car dependent in the 70s as they were in today, but if you look at photos then, you'll notice how uncannily THIN everyone was.

If you dig more into it, you'll find the obesity crisis started around the late 70s with a change in dietary guidelines and medical guidelines saying basically 'fat & meat bad' and 'carbs good' along with the widespread introduction of vegetable oils, leading to too much insulin and other hormonal effects slowly increasing diabetes & obesity in our population. Also food companies honing on what obesogenic combos of food lead to people to eat more, buy more and thus get better sales.

Read "The Obesity Code" if you want a more detailed description with a lot of links to papers and studies for more info. [0]

[0] I said this yesterday too in another article: https://news.ycombinator.com/item?id=25767604


After moving to Japan and living here for a while, I realized when I visited my family back in the US how much of a punch in the face of sweetness/richness literally everything available in US restaurants is; it was honestly exhausting. Plus the fact that the portion sizes are double that of anything here, it's no surprise to me that Americans are obese and Japanese people by and large aren't.

For another anecdote, my wife's friend worked at Starbucks in Canada and in Japan. She said the Frappuccinos in Canada use around double the amount of syrup than those in Japan.


When I moved from Brazil to Canada I was kinda surprised with the portion size in some restaurants here. Also:

> how much of a punch in the face of sweetness/richness literally everything available in US restaurants is

Yeah, too much sugar/salt/syrup/condiments, too many artificial ingredients on things. Today I was talking to my wife how the Cheetos here is not so good, as it has a weird orange color and the taste is way too much superficial. The cheese too. too many cheddar varieties with colors that doesn't seem like something made out of milk.


Milk in general is high calorie + high fat and a Starbucks Grande is 5 times the size of a typical coffee I was used to. Not to mention the fact that they charge a good chunk more for other low calorie non-dairy substitutes. A typical meal at an American restaurant is two meals - easily - and our portion sizes are not small by any means.

The sweetness is another major put off. There's no concept of a savory snack here. There's also no culture of an afternoon or tea time snacking. In my personal opinion, having a small post-lunch snack helps me stay satiated for longer and have a much smaller supper instead of a large dinner.


American sauerkraut, the kind you can buy in supermarkets, has SUGAR in it! What is wrong with you?!? :-(


Everything has sugar in it. Even Sriracha!!! My experiment with cutting adding sugar completely for a month was the single hardest experiment I ever did with my diet. I lost 10 pounds in a month - absolutely unhealthy and I had to reverse course because of that. But, that's how much sugar there is in American food.


There is a great youtube video about exactly that:

Why is it so Easy to be Thin in Japan?

https://www.youtube.com/watch?v=lr4MmmWQtZM


What’s the percentage of food spend in the 70s vs today? If I read the USDA charts, it’s about 13% for the decade of the 70s, declining to under 10% today. So I would expect that as food gets significantly cheaper, people consume more of it.


Are rich people on average fatter than thin people? After all, they can afford more food, so presumably they consume more of it.

Spending has dropped because there are such large subsidies to cheap carbs, and that is the bulk of many people's diets. A steak and veggies is no cheaper than it was 40-50 years ago, but we're eating far more refined junk with additives because it is cheap and convenient.


I'm not quite sure what your first point is? Infamously, rich poor are on average thinner (the "poverty obesity" paradox).

I believe the leading hypothesis is that being rich absolves you of the stressors that make junk food attractive. Others are, as you mentioned, the ability to buy more expensive food with more nourishment/satiation per calorie ("protein leverage hypothesis"), or access to nature and refuge from pollution (it's certainly the rich people where I live who ride bicycles.).

Regardless, a poor person from 50 years ago couldn't buy the cheap sugary crap even if they wanted to.


My post was in response to the parent's statements "If I read the USDA charts, it’s about 13% for the decade of the 70s, declining to under 10% today." and "So I would expect that as food gets significantly cheaper, people consume more of it."

That is, the point of the parent's post was not obviously "crap food is so much cheaper than high quality food", but as most naturally read as "because we can afford more food, we're buying and eating more"

My point was "if that logic holds, I would expect the rich to be significantly fatter than the poor". Which, as you note, is not the case. Nothing more.


Portions are now massive. McDonalds, once upon a time, had small and large sizes of french fries; the little white paper pouch or the red cardboard sleeve. Today I believe they have two even larger sizes. The smallest size of soda doesn’t even exist any more.

Other restaurants have retired round plates and serve meals on platters.


I also think cheap food tends to be worse for you on average.


This sounds like the equivalent of lead poisoning being one of the causes for the fall of the Roman Empire.


Is there a study about this?


Please check this video on Vegetable Oils: The Unknown Story by the author of the book "The Big Fat Surprise" [1][2].

[1]https://www.youtube.com/watch?v=Q2UnOryQiIY

[2]https://www.amazon.com/Big-Fat-Surprise-Butter-Healthy/dp/14...


Don’t forget everyone in the 70s who smoked...


The type and quantity of available food is a huge factor. In the 1970s more people were also involved in jobs that required more physical labor: farming, manufacturing, construction, etc.


>We'll get there ...

You can also write an article for the Huffington Post arguing it's impossible to ever lose weight.

I'm not calling for fat shamming, but you can't be both obese and healthy. You can't really be obese ( over a certain point anyway) and be happy. When I was over 300 pounds every day was an experience in pain.

But it's considered rude even for doctors to say you need to lose weight. I was fortunate enough that an alternative medicine provider told me to just lose weight.

And that said, I'm even reluctant to make the argument above since there's a lot of really angry people who will try to misconcue it and call me a monster or something. But I've been morbidly obese, and I'm in shape now ( still trying to lose that last 10 pounds ) .

Life is better now in every single way.


> But it's considered rude even for doctors to say you need to lose weight.

I'm pretty sure this isn't actually true. I mean I'm sure there are some people that get offended, but some people will get offended at anything and being called "overweight" when you are convinced you are just "big boned" isn't pleasant.


My doctor told me to lose weight. I wasn't offended, I'm not stupid.

It wasn't my doctor's advice that led to my weight loss though, it was my father dying prematurely. He wasn't even obese, he just had a poor diet and little exercise. A real wake up call.


> But it's considered rude even for doctors to say you need to lose weight

Really? Is it a US thing?

I'm overweight but not obese, and basically every doctor I've seen for various issues (blood pressure, back pain, sprained ankle) told me to lose weight, in two european countries.


> Really?

I don't think so. They may be referring to the fact that it is increasingly becoming an issue of political correctness. But science is pretty clear about the risks of obesity and the medical professions follow that.

https://www.nytimes.com/2013/06/19/business/ama-recognizes-o...

I have a friend who's (US) doctor told he needs to lose weight or he will die. It got him to join a gym at least.


There is a Far Side cartoon with an obese doctor talking to an obese patient, and the patient says to the doctor, “you’re the first doctor who has not told me to lose weight!“

Obesity is more or less considered to be normal now, it’s a real shift in the last few decades.


Anecdotal from SoCal, 2 years ago I saw on my doctor’s chart that my BMI placed me in the obese category. She said nothing to me about it. I wish she had bc it was a shock to me. I had become so accustomed to that weight, and everyone I was around was a similar weight so I just didn’t know. If I hadn’t seen it on her chart I would not have made any changes.

With my new doctor, I was looking at my last 2 yrs of blood tests and my LDL cholesterol has been at 105. Losing more weight will help with that, so will changing my diet - but my doctor didn’t point my LDL out as a problem even though it is.


It would've been the right thing for her to tell you. But unfortunately, if she tells the wrong person she could get called out for fatshaming on social media and probably lose her career nowadays. It's the rational choice to not offend anyone's feelings, when those feelings can be used to crush you and your livelihood.


> You can't really be obese ( over a certain point anyway) and be happy. When I was over 300 pounds every day was an experience in pain.

So if that's the case, why does it matter what the Huffington Post says?

I'm not morbidly obese, so perhaps I've missed the pro-obesity PR. A fashion magazine might give a cover to an obese model once a year, but the other 11 months all seem to have the same rail thin models that have dominated since the '80s.

Same goes for TV and movies. Producers wouldn't hire a fat guy to play Mark David Chapman, it'd be an easier sell to get a fit actor and have him balloon up to that desired weight.

The only obese poeople of renown in our society are older politicians and the rich, i.e. people that do not care about meeting society's beauty standards.


>but the other 11 months all seem to have the same rail thin models that have dominated since the '80s

People used to see those and aspire to be like them and improve themselves. Something changed over the last decade or more, and now no one wants to do any better than they currently are. They are despairing in content with themselves.


>Something changed over the last decade or more, and now no one wants to do any better than they currently are. They are despairing in content with themselves<

People still aspire to be attractive they just don't feel the same social pressure to chase it that they used to. Personally I don't see the problem for the USA, if people are happy being unhealthy then let them be unhealthy. If this was Europe I could see a public cost argument but US businesses are already starting to charge more to people who are inconveniently obese so I don't see why it's a real concern.


> Personally I don't see the problem for the USA, if people are happy being unhealthy then let them be unhealthy.

They're not happy. They're suffering and helpless. That's the problem.


"people that do not care about meeting society's beauty standards"

It's not about beauty standards, it's about healthy standards. Remember when there was a push-back from models being too thin? Everyone agreed that it was bad to show ultra-thin models because it was unhealthy and generally unobtainable. The same should be for overweight people, except now we have the concept of body-shaming (which didn't apply to ultra-thin models??). There needs to be more of a focus on self resposibility along with a push-back against the bad practices of the food industry.


While it may be true that the American lifestyle is more sedentary, I don't think obesity can be entirely or even mostly explained by that. AFAIK diet generally affects weight more than exercise does; if your diet is energy-heavy, it's very difficult (without being an athlete) to exercise enough to consume as much as your energy surplus from the diet is.

I don't have any references or numbers to back that up, but that's what I've understood from what I've read in papers and heard from some people who apparently did the math.

With that said, physical activity has lots of benefits beyond just weight loss, and it would be worth it to make one's lifestyle non-sedentary in any case.


You're right, it's impossible to out-exercise a bad diet, but there are secondary reasons that being sedentary leads to weight gain besides just the raw number of calories burned.

For one, an hour you spend exercising or walking around is probably an hour that you're not eating. Many Americans are constantly eating when they're at home, either mindlessly snacking or eating a huge meal. Given that you only have 8 hours between work and sleep, occupying yourself for 1 of those hours could mean a significant decrease in time spent eating.

Incidentally, this is why intermittent fasting works well for some people.


Well it's not literally impossible to out-exercise a bad diet. Look at what some ultra endurance athletes eat. But those are extreme outliers and that lifestyle isn't really sustainable.


Once you start tracking the energy usage of exercise with a smart watch or similar, you'll notice that even extended exercise consumes almost no energy compared to the energy used simply living. Doing an hour of heavy exercise only changes my total energy usage for the day by a fairly small % compared to no exercise.

Diet is clearly a much more important aspect for weight loss. Exercise has many other benefits though.


I don't know, my Garmin watch says my daily 1h-1.5h long walk burns about 500-600 calories. It could be wildly inaccurate. But it definitely gives me more cushion to eat comfortably during the day that is for sure! I realize it is dwarfed by the 2000+ calories I burn naturally but that is almost another meal in calories.


You burn about 100-150 calories just by existing for 1h-1.5h, so walking for an hour or so only gets you an additional 400 calories. Versus eating, you can consume a 400 calorie cookie in one minute.

When I lost 70lbs, I did so by deciding it was easier just to not consume the calories in the first place rather than trying to burn them off.


It’s really a case of the rich getting richer when it comes to exercise, because if you’re fitter you can sustain a calorie burn rate far higher than someone who isn’t.

On my bike I have a power meter which uses strain guages and an accelerometer to calculate force x distance / time at the crankset so I have accurate calorie burn numbers.

Riding for an hour at the output a generally sedentary person can manage, I’ll burn sub 500 calories. Riding at my maximum output for an hour burns about 1000. Given that the recommended energy intake for a day is 2500, you can see what a difference that makes proportionally to what you can consume.


Indeed, energy intake is a big part of the equation and indeed a single run/exercise will not burn off a gigantic amount of calories. What repeated exercise does do is to raise your metabolism and increase muscle mass which will increase energy consumption at rest and combat all kinds of other symptoms.


Heart rate or step based calorie tracking is so inaccurate that you might as well just use Math.random.

The fact that companies sell you these “features” in products is a scandal in my opinion, because it’s nothing more than a totally inappropriate guess. They always overestimate based on my experience when compared against actual output measurements, and that can only be harmful to people that are trying to use them to lose weight.


An average 10km run burns 600cal. Sure just living burns 2000cal, but its a noticeable change. In Addition, for most people its much easier to track their exercise, than pedantic tracking calories.


A casual search on google says a chocolate bar is about 500~600 calories ... so you could maybe skip that chocolate bar and not feel the need to run so much.

(Not to totally give up exercise tho' - there are other health benefits besides losing weight)


This is often expressed as: You can't outrun your fork.


It's really that baseline metabolic burn is pretty high, you have to work a lot to double the number of calories you burn, but it's easy to eat double your metabolic needs


That tracks with what's written in The Hacker's Diet, and I think it's largely right. If you look at how much running you need to do to burn off a daily burger it's intimidating.

The only caveat I've learned is that weightlifting can make a dent. It's one of the few things where as you improve, you can burn more calories in the same amount of time instead of fewer (partly because you're doing more work as you add weights, partly because the muscle you build is more metabolically expensive to maintain).

I also had success restructuring my life so accessing food was way more of a hassle. Kept a mostly empty fridge. Meal prepped so only whole meals were there. Don't take money unless I know I need to buy something, found a few reasonable options at local sandwich places that became routine, etc.

I'd love to see a correlational study on fridge size and obesity. In America we buy SUV fulls of food, in Europe it's much smaller frequent trips, i.e. generally higher hassle per calorie.


>easy to eat double your metabolic needs

Or more! When I started losing weight, my target was 1600 kcals a day. I learned that I was eating 1600+ calories __every single meal__, plus snacks. Pasta is the devil y'all.


> Pasta is the devil y'all.

And yet Italians are generally slim and healthy :)


To be fair they don't eat all that much pasta.


The sum of kcals is not as easy as that,

In take is the kcal of the food times the digestion factor. The kcal out is the metabolic need, which depend on factors such as fat building vs energy usage, which in turn is influenced by stress but also things like dieting.

This is why counting calories can be an ineffective strategy for some while for others it is a good match.


kcal of food is still an upper bound on bioavailable kcals


Let put this is numbers for illustration purposes.

Let say 1000 kcal in, and for an average healthy person 1000 kcal in metabolic rate.

For digestion, this person eat mostly proteins resulting in about 20% of kcal going into energy for the digestion system itself (proteins is relative hard to break down). Let also say that in addition, sloppy digestion and incorrect gut bacteria is resulting in additional 20% of the food never getting digested and resulting in feces. Result is a loss of 400.

If thats the whole story you have a person that is loosing weight despite keeping a diet that seemingly fulfills their calories need.

Lets now change metabolic aspects. Rather than suffering from bad digestion they are suffering from chronic stress with high cortisol, adrenal and other stress hormones. The body crave more food that cost less to digest, ie fat and sugar, insulin is spiking in order to get the body to take up more energy, the body goes into lethargic state in order to save energy, muscle and organ cell production is decreased in favor of fat cells. Instead of 1000 kcal in metabolic rate we might have 600 kcal, with now a surplus of +400 going into fat production.

The upper bound on bioavailable kcals is still 1000 kcal, but the numbers won't tell you if the person is going to loose weight or gain it, unless the person is in good healthy to begin with.


I found this pasta made purely from peas or beans in the shop. They are a bit harder to eat but fill you up much faster and feel lighter in the stomach. (And they have less carbs and more protein.) If you like pasta I can recommend trying this.


Hmmm this makes me think of powerlifters. Curating a 'power gut' is pretty normal for competing lifters (even hobbyists).

Intuition would make me wager testosterone levels of you average powerlifter would be in the higher ranges (necessary to build muscle), despite not generally being lean.


> Further, many Americans are 1-2 generations removed from "the farm" and are still heavily influenced by habits like "three square meals per day" that made great sense on the farm and make no sense at all in the city.

Meh, Americans snack all the time. French people are anal about their meal structures and times and we’re not fat.


It's weird how HN commenters consider free office snacks as an employee "benefit" and complain when they're taken away. I'd rather the company not put any snacks out and remove the temptation. For most of us that work at computers all day we really don't need extra snacks.


The bigger and unhealthier you are, the less motivated you may be to get up and leave your desk.

Or...to quit and become a lumberjack, etc.


I concur. I am French living in US. And I do not snack at all. I only have 3 meals a day. And I try hard to get a lighter dinner (dinners here are generally too big for me).

I don't like to go to parties with an empty stomach, because of the poor choice of food there (chips, salsa, cake, cookies, etc.). If I go with an empty stomach, I know I would not resist, and I would feel sick and bloated later, high on sugar & salt, and dehydrated with alcohol.

Just don't snack.


One time I went to a restaurant in upstate New York and I swear to god, I ordered the chicken and an entire roasted chicken arrived on a plate! The mashed potatoes came in a second plate and I spent the first 15 minutes laughing at how ridiculous it all was. Oh, and my meal without drinks was like $16.


I agree that portions are ridiculous, but do Keep in mind that in most lower-end restaurants the customer expectation is to have enough for a doggy bag


Doesnt that just mean you are going to have two or three unhealthy meals instead of one?


portion size is generally way way way too big in the US. I always put on weight when I visit the US.


I live in China, I can assure you there are plenty of obese chinese people here in the major cities I've been to. It's not as bad as the US, and the culture is more aggressively against it, but it's not uncommon. Obesity is a problem that most developing nations are facing. You can buy junk food anywhere.

> If one does not live in a modern city center one barely ever walks. Most Americans sit all day - at a desk or in a car.

As opposed to someone in China, where we must do such extraneous physical activities like order take-out delivered to our place less than 15 minutes, then order a masseuse to come give us a massage and finally order a bottle of wine to top the night off, all without needing to get out of bed.


As a formerly obese American, I need to say you are both right.

The food ingredients in this country are, on average, garbage. With careful shopping you can get around this but it does take effort and vigilence.

Cultural expectations around both diet (especially portion size) and exercise (I cite the walking thing a lot too) are also bad. It takes effort to avoid those hazards.

I think both of these and probably a few other factors are a terrible combination that compliment each other in a bad way.


Portion sizes are a huge factor. My wife tried a few new recipes this week. All of them said they serve 4. We are a household of two adults and one almost adult and didn't eat half of what she prepared (they all tasted great).

That said, I'm 30 lbs heavier than I was a decade ago. I know WHAT I need to do (exercise more, drink less), it's just been hard to get back into better habits.


Vietnam has the lowest adult obesity rate yet is the 8th most sedentary population. The only thing I see that accounts for this is the lack of cheap, processed foods. The Vietnamese diet is largely prepared at home from scratch. Sugar is not crammed into every effing thing you eat the way it is in the U.S.


Were you travelling in Europe? I typically lose weight while travelling because I'm walking more and have fewer snacks around. This includes months in the US last year where pace and timing of a lot of our driving meant we ate fast food a bit. It was hot so we couldn't stash chocolate/ice cream, we didn't have access to a fridge so we didn't scoff leftovers, etc. We mostly lived out of a cooler and cooked on fires. We walked around exploring cities/towns where many residents would not have though. The number of mobility scooters and the like is incredible.


I lived in Europe for multiple years and then moved to the US. I gained a lot of weight. This had to do with both less of an effective culture of walking and public transit in the city I lived in the US. And also the quality and availability of relatively healthy, tasty foods at a reasonable price.

I’ve also had the same experience on shorter (few month) stays in Europe, while still working a 9-5.


When I came to the Philippines I was shocked by the large number of obese people here. I thought it would be like China because that was my only reference point in SE Asia. Relatively speaking, it's not as bad as the States or the UK but it's getting there. If you look back only a few generations, you'll see what happened here: they were colonized by the US and adopted Western-style processed food and soft drinks. Also, car ownership is a new thing for most families. Before WW2 this was not the case, and thus there was far less obesity.


Western style != American style.

Philippines was part of the Spanish crown and had Spanish customs. Plenty of European (Western) countries have balanced diets and healthy lifestyles.


They were under American rule more recently, and were only given their Independence without a fight after agreeing to preferential trade on importing American products.


I didn't argue about that. I just said that before American rule they were ruled by Spaniards.


Sure, for you and I it's not equivalent.

But for them, it might as well be. People simply did not eat large amounts of packaged, processed food only a few generations ago, like people do everywhere in the west, including the EU.


I just complained about the use of "western diet" as a catch-all epithet for unhealthy, processed food.


I barely walk, but I've been losing weight like mad because I've been cooking at home everyday now, not eating fast food, and not drinking soda. Look at the ingredients for any premade foods, even the ones that bill themselves as healthy, they are mostly sugars and carbs and sauces containing HFCS. Also, the caloric density is insane, one "meal" can be upwards of 1500 or 2000 calories if you ignore their "suggested serving" which is unrealistic to what people eat.

Also, exercise accounts for maybe a hundred or two calories a day for the average person who isn't into marathons or something, so the only true way to lose weight is to decrease what you eat.

It's not lack of exercise, that's the way these corporations try to blame you for being lazy so you forget their food is garbage that's making you fat.


Only in US there's this serving size bullshit that requires effort to figure out how much you're actually eating.


Exactly, that's why we're fat as fuck. We don't have the same culinary habits as most of the world. I ate a cookie for lunch today: it was 500 calories.


I personally think that body composition is 80% food and 20% work.

Yes, driving cars everywhere is not great. But we’re also more obese than other car dependent cultures, so it’s not a satisfactory answer to say that it’s entirely about being sedentary.


I agree that there is a big cultural factor here. I wish people focused on this more. So many people want to look at correlations like income:BMI that don’t generalize to other countries or cultures. Really what they expose are cultural and societal idiosyncrasies, much more than they expose that “cheap food is not healthy”. Of course, that is less appealing to an epidemiologist because the cause and effect is less clear and has much greater implications than recommending more exercise.


I actually lost weight when I moved from Switzerland to the US. The food just all felt somehow gross, so I didn’t eat much (also the options on campus were incredibly limited, apart from these horrible undergraduate dining halls there were few normal choices and most only served food for around 2 hours - the food at the supermarket also felt strange)


I’m curious, how did the food in the supermarket feel strange?

I eat mostly fruits, veggies and meats. Pretty much 80% natural foods. But I live in east Asia now so it’s easier to do that and with more variety.

But, I don’t recall American supermarkets food feeling strange. Unless you mean the processed stuff?


The processed food I avoided mostly, though I do that in Europe as well.

For the rest of it: might just be my perception to be honest, my impression was that the fruits and vegetables tasted very watery with little flavour, as if they were grown in the most efficient way to bring them to market quickly. Same for the meat, was kind of floppy and the cheese just didn't taste like much. There were some good things from farmers markets, but at absurd prices.

I see differences in Europe as well, e.g. I think the quality in Switzerland is better than Germany and Austria. In Spain and France I was able to get really good food, probably because it's closer to where it is produced.

Again this might be my perception, didn't do a blind tasting. Unless the food is specially prepared to be stored (like fermented food, cheese, etc.), I don't think the highly industrial production, refrigeration and long transportation is doing the quality any favours.


This isn't the first time I've heard this, and a quick Google search with the right keywords brings up:

https://www.greenoptimistic.com/fruit-vegetables-taste-europ...

https://www.treehugger.com/why-doesnt-american-produce-taste...

The key point seems to be that we prioritize the looks, which unintentionally affects taste.


Walking burns like, what, 5 kcal/minute (generous)? If non-Americans walk on average 20 more minutes a day (generous), that's like 100 kcal per day. Or about 7kg at 15 kcal/kg basal metabolic rate, not taking into account for increased appetite.


While you have a good point, I want to nitpick a little:

As an American who recently moved to Europe, I don't think 20 minutes of walking per day is being generous. COVID-related measures aside, I find I add about 20min/day of walking easily, and more if I need to do something (e.g. buying groceries). Now, in the US I own a car and here I do not -- but in my Midwestern town I am totally obligated to own and operate a car. Here in Europe I get along fine with walking, riding a bike, and using public transport.


> I think America is one of the most obese countries on earth.

Yes but not by a very wide margin. [1]

Average BMI in the US is 28.5, Saudi Arabia is the same, Mexico is 28.1, New Zealand is 27.9, UK is 27.3, Canada is 27.2.

My point is that the impression that the US is unreasonably fat compared to the rest of the world is mostly just bias.

[1] https://en.wikipedia.org/wiki/List_of_countries_by_body_mass...


I don't have any stats to back this up, but the impression I got from the states is that the weight gain is distributed unequally.

Some people seemed very very fat.

Edit found something that would support that idea.

Proportion of people who are obese over the globe: https://ourworldindata.org/grapher/share-of-men-defined-as-o... https://ourworldindata.org/grapher/share-of-females-defined-...


This matches my feelings. I'm Australian and id say the average person is overweight but not very overweight. I don't know how common this is in the US but you see those photos of people in Walmart with fat hanging over both sides of the scooter and its something I don't think I have ever seen in Australia.


At least in my rural part of the U.S., you are likely to see one such morbidly obese person at any given WalMart at any given time of the day. But that’s unique to WalMart. You may see such a person at other stores, but something about WalMart attracts the morbidly obese. Then and pickups with lift kits and guys with camo ballcaps.


> photos of people in walmart

Walmarts are everywhere, there are thousands of them and millions of people in them every day. You're going to see the best and the worst just because of sheer numbers.

Not saying that the fatest American isn't fatter than the fatest Australian but "people of walmart" is a bit of a misnomer because you only need one picture of a fat person in a Walmart and there's literally millions of opportunities each day to see that one example.


Averages can easily be misleading in analysis like this, so I don't think you can draw that conclusion.


The US is unreasonably fat today compared to the US 50 years ago. That seems like a more useful comparison than looking at other countries.


I think you are just pointing out very car reliant countries. London has good public transit, but the rest is extremely car dependant.

This shows IMO in obesity rates - they are significantly lower in London than the rest of the UK.


Same thing in many US cities where walking is the norm.

The other major factor is wealth. Richer people can afford higher quality food. Poor people generally consume more calories from junk foods and sugary drinks, which are staples of drive-throughs and fast food chains.


Not sure that the UK is that car reliant. I guess in rural areas, but that's true in most countries. In cities, not at all.


62% of all trips in the UK are made by car, compared to 26% by foot, 6% by bus, 3% by train, 2% by bicycle. https://assets.publishing.service.gov.uk/government/uploads/...

It is not as entirely car dominated as the USA, but I think it's pretty fair to call it "car reliant".


It very much depends on the city. London has excellent public transport (and is horrible for driving), other cities are much more mixed.


I'd say the average misses the point here. That's quite a lot people! All addicted to sugar and fast food. This is a huge market. Same as the market for fighting the results of this unhealthy life style.


> Here if I eat junk food for 3 days my weight jumps by 7 pounds.

If you are gaining 7 pounds in 3 days, I imagine the vast majority is just water weight, which can probably be attributed to the salt levels in the junk food more than anything else.


I was in Germany for some time, I thought I would lose weight walking everywhere and eating differently; but I actually didn't lose a single pound. I don't know if muscle replaced fat, but I felt I looked the same and weighed the same. I was truly baffled.

During the early pandemic, I stopped drinking for 3-4 months...and still didn't lose any weight. I honestly don't understand the human body.


Genuine question: do you have biscuits, confectionery or ice cream in your home normally?

The most shocking thing to me when I first moved alone was how easy it was too eat a ton of sugar, without realising it till after.

My solution these days is to just ensure its not there, and commit to not getting takeaway (easy if I think about all the money I save).

Even doing all that, I still have habits I need to keep up: eating toast too often is a problem, for example. I've eliminated peanut butter entirely. Don't eat lunch when I'm at a desk job and replace it with just mid afternoon coffee to keep me going.

The human body is stupidly efficient, unfortunately.


I think you need to count calories to really know what your eating. I did it as an experiment for a week, it really interesting to see how fast you blow through your daily calories snacking or adding sauce


Yes, do this.

It's shocking how much of your calorie budget a sugared soft drink has.


Strangely, it’s both most of your calorie budget, and none of it at the same time.

Soft drinks have a ton of calories which have to go somewhere; we all know that. The paradox is that the human brain does not generally treat liquid calories as calories. So even though you might drink down 300 calories of soda, your brain will not adjust your hunger levels to match. This is obviously very bad.


Oh yes, satiety of food is a hidden thing people don't talk about.

Eat warm porridge and on average you will feel twice as full as the equivalent calories in white bread: https://pdfs.semanticscholar.org/b3cf/3b7d71a7485e6355e49b2e...


Anecdotes in this thread aside this is exactly what you would expect. I believe there is strong evidence for a metabolic set point maintained by the body established after some period of time. If you can maintain a weight for a year or something you body works to keep it.


> You can read all the dating books you want, but getting in shape is the only thing that works.

Counterpoint: I got in great shape in my early 20s, but didn't have much luck with dating because I was still a "Reddit niceguys"-style jerk

Later on I stopped being a jerk, and even though I ballooned back to a very stately American weight I had way better luck with dating. Including "attractive females" as a young involuntarily-celibate gentleman might say


Agree. Try to be a good person and be honest. Treat your hygiene as important, clean up your home and maybe think a little bit about some clothes that look nice on you. That's all you need to do.


Assuming you're at least moderately physically attractive. And even then, the quality of partners you can attract in terms of looks is non-linearly decreasing as your own physical attractiveness drops. OkCupid studies have proven that women find 80% of men below average looking.

If you don't happen to be at least average in terms of looks, things are looking grim.


This is like looking at hiring statistics and deciding you'll never get a FAANG job unless you went to a top-tier university

Going on a dating site and messaging attractive women there is like sending resumes into the online job sites for Google/Facebook/etc. MAYBE you'll get a response, but more likely you're just wasting your time.

In the working world, you can build up your skills and network to get a referral

In the dating world, you can improve your hygeine/personality and get an introduction via mutual friends/family/family's friends/family's friends' coworkers.


Speak!

The best way to meet people will always be to leave your house and become socially active. You may even meet people of various genders just to hang out with ! Online dating profiles are more mostly bots / con artist anyway. The FTC filing against Match goes into detail here.

The best fun I've had was on the way to the club with my amazing friends, irrespective of if I meet anyone that night. The biggest sin of social media has been to convince people they didn't need real friends .

The world is great, is you save the 40$ a month Match.com cost for 12 months you can afford a trip to London or Paris, then at least you'll have some interesting stories to share at your local bar!


And why do you think that would be any different?

Do you seriously believe women will suddenly view a physically unattractive male as sexually desirable just because they got an introduction? It doesn't happen.

Raw sexual attraction is not something one builds towards with friend/family introductions/referrals and good hygiene. It's a visceral, almost animal-like condition that manifests at the drop of a hat and physical appearance (face, height, build) is _the_ most (if not the only) important attribute.

Those that have won the genetic lottery are smooth sailing. The sky is the limit.

Those that are average have to put in work to get results (and there are definite limits, they will hit a ceiling).

Those that have lost the genetic lottery are kneecapped from the get-go and they're looking at a vastly diminished set of possible partners and opportunities.


Beware typical-mind fallacy. This is a common source of friction even within couples. People don't all experience attraction the same way, for the same reasons, with the same curve of intensity over time. People don't all assign it the same weight in their relationship decisions. Especially across gender lines. Social and behavioral factors can be a lot more important than you'd think. Confidence, competence, humor, status. Cultural archetypes. Personal archetypes. Social proof. Trust, care, familiarity.

Will she sleep with him that night? Probably not. Would she agree to a date right away? Also probably not. Six months later, after a dozen group social events, might she have a serious crush? Decent chance. (Might his fast-burning infatuation be dead by then? Also yes, been there done that).


If you have others to vouch for you it's helpful since one thing everyone look for is creepiness - how much of a danger could you be? If you're just shy or awkward it might mean tough luck since it's hard to differentiate, but with an introduction this is much easier to overcome.

Seriously, the first hurdle is not 'is this guy sexually attractive' but 'is this guy potentially dangerous', and it's far safer to err on the side of caution.


I've never seen anyone imply: "this person is not a danger"...

I guess you can get some signals, sometimes... For when a person IS a danger.

But anyhow, most abuse happens in the privacy of a home, so I don't think I'd be able to vouch for anyone to really not be a creep. You never know what side of their personality people might be keeping hidden.


The signals that someone isn't a danger are not in any way related to if they are or not from what I can tell.


Creamy, I am 42 and I spent most of my dating period offline.

There is more to sexual attraction than photos. Sense of humor plays a great role. If you can make a girl laugh out loud, you're half way to wherever you want to have her. As are other elements of personality; some people are so irresistible in person that you forget their homely face. This works for both sexes, btw.

Yes, this does not work on Tinder, unfortunately. Dating apps are absolutely unnatural in this regard, very one-dimensional.


Physical appearance really isn't the be-all and end-all you seem to think it is. Social status is also important. Being well liked and respected, highly skilled, charismatic, or just plain rich, all confer social status. High status people hang out with other high status people. An introduction from a high-status person implies that you also have high status, and does indeed carry value.


Not when it comes to sexual attraction. Women are not sexually attracted to your wallet or social circle.

Sure high social status alone can help you land relationships but absent raw physical attraction, the foundation will be shaky. There is such a thing as a trophy wife / gold digger after all.


This raw "sexual attraction" stat you're going on about is basically the only thing that comes through on a dating app for hookups, but it's WAY less important when you meet someone in person and kick off an actual relationship. Especially if you meet them at a group outing with mutual friends.

Instead of being a sweaty, nervous wreck desperately trying to hold an awkward conversation, you could just be a cool dude hanging out with his friends, playing Fortnite or hacking firmware or making pizza. Your date can see what actually makes you cool and fun, instead of just seeing some fake persona you've constructed.. and if she doesn't like it, forget about her.

People tried to tell me this when I was a kid/younger man, and I just assumed they were all a bunch of ignorant old fools. I didn't figure it out on my own until I was in my 30s, and then I was married before I knew it.

I do my best to try and pass this advice on whenever I can, even though I know that most guys who had the same issue as me won't heed it. Shockingly, I explained this to my greasy 12 year old nephew when he was complaining about women.. at the time he basically told me to piss off, but a few months later he had a girlfriend, haha.


I'm not sure how you're defining "sexual attraction" here. If women want to sleep with you, you're sexually attractive. Women line up by the thousands to sleep with famous musical artists, and it ain't because they're chiseled Adonises.

(incidentally - is 'creamytaco' a veiled sexual reference?)


For me, the most frustrating is the failure mode. With people, not being popular doesn’t mean you won’t meet or date, it means you will have a constant negative experience. You may date a nice girl (boy in my case) but the relationship will be taxing, as in you’ll have to work more for the relationship than the other person.

It is entirely justified and reasonable, but if you didn’t notice the gap, you will end up believing people have a bad character.


And unfortunately this can impact their career opportunities as well.


the only way it's going to have a really substantial effect in the USA is if you have bad hygiene

Personally, I think that whiteboarding/in-person interviews are mostly BS and "culture fit" (AKA: You like the person) has an oversized impact. But since you're not trying to woo the hiring manager into bed with you, you just have to make sure you aren't obnoxiously gross. Even if you're the ugliest dude on the planet, all that means is you need to take a shower and wear clean clothes.


Take that stat with a grain of salt. Obviously 80% of women don’t die single & childless, so clearly they just might value non-looks more highly than men? Also OKCupid is purely static visual - in reality, behaviour (confidence, boldness, social skill, ...) is very important as well, but you can’t judge that from a photo.


Sorry, what do you mean « being a jerk »?

I know I’m sounding naive, but if it’s something you decided to change and were able to, maybe it could be interesting.


Whatever it is, it started in the mid 70s. You can see the exact moment obesity rates launched upwards and never looked back.

https://www.niddk.nih.gov/-/media/Images/Health-Information/...


"Here if I eat junk food for 3 days my weight jumps by 7 pounds."

That's impossible you would have to eat 8167 extra calories a day to do that, you are doing something else like drinking lots of water or something.


I see the same, but typically five pounds.

I believe it’s my glycogen storage increasing, along with water weight due to the excess salt.

When I stop, it comes right off again in a couple of days.


Also keep in mind that in vast swathes of America, kids are brought up with low value high calorie food. If you are used to junk food, that's chemically engineered to appeal to our caveman instincts it's incredibly tough to switch later in life to a healthy food lifestyle.

This pandemic of shitty food starts with the kids and their tastes being set at a young age.


The fact that America can't even do chocolate right tells you everything you need to know about the food. Having been to America several times, I've eaten some amazing restaurant food, but the stuff bought in supermarkets is where I think the problem lies.


Just came back from 3 weeks in France, over holiday season. I stayed with my parents, and my dad is a cook... so I did eat well :)

Still managed to lose 2 pounds. In the 3 days I was back here, I managed to eat a burger and pizza. I guess I could have politely say no. But clearly the processed food here in US is ubiquitous and cheap, so difficult to escape.

No idea if this is the reason of lower testosterone. But I realize that simple food based on fresh products would go a long way.


It's mostly the food. It's not like people in other countries get that much more exercise than we do. (Source: lived in Ecuador for two years).

I watched this youtube video recently about recipes for cutting (weightlifting term for a diet that makes you lose weight) and eating some of the food has helped me lose some weight.

https://www.youtube.com/watch?v=86ieFuh_4Vs


Food is definitely a big factor. Here in Brasil it's not like we're super healthy eating, we are much more into real food than America, it was the impression I was left with. Some things just seem arbitrarily made junkier for no reason. My colleague who lived in Italy through masters and doctors and recently came back comments on how in Brazil we eat way more meat than europeans, as an additional point of comparison.


It's tough to eat enough meat to get really fat. Most people who try a carnivore diet end up losing weight. (I am not necessarily recommending that people follow a carnivore diet because it might have other negative effects.)


Here the diet is kind of meat and a lot of carbs at all meals(rice & beans in portuguese actually is a term meaning "the basics"), prefferably with a lot garlic and salt.


> I think America is one of the most obese countries on earth.

World obesity rankings are curiously topped by a bunch of small Pacific island nations and Kuwait, followed by the US:

https://en.wikipedia.org/wiki/List_of_countries_by_obesity_r...


> Not exactly easy to stay in shape when this country tries to pump us all full of corn syrup

That's it I think. Advertising has become much more effective over the past 40 years. Humans can simply not resist.

There should be advertising for healthy eating, to steer people to healthy food.


There should be advertising for healthy eating, to steer people to healthy food.

The problem now is we have #fatfobia that shames people for advertising their healthy lifestyle.


I disagree. Don't blame USA, after all you decide what goes into your mouth. Whole Foods ain't junk and Walmart has a decent plant based area. If you wanna find junk, you get it - everywhere.

Europe is on the rise: https://www.euro.who.int/en/health-topics/noncommunicable-di....

No way to, pun not intended, sugar-coat this fact.

Sorry to say that, but "moving to a healthier country" is an excuse. Come on, dude! :)


In fat tissue testosterone gets converted into estrogen via aromatase, also. Not sure if the estrogenic effects are systemic, but the T is lost from circulation.


Oh interesting. I find that when you look how people move, ie walk or sit down, you'll often find that men with big bellies move very deliberate, not forceful at all.


> I completely blame the food

I don't completely blame the food itself. It's more about food habits.

One of the things I found very weird was American portion sizes. Go to any restaurant and plates were easily double the amount I was previously used to. I felt bad leaving almost half of a plate every time.

And then... I got used to it. But also very fat. With similar levels of sedentarism so it's not only about exercise levels. And frankly, while exercise is healthy, you don't burn that much energy with cardio. Every time I do the calculations I'm shocked. From a weight loss perspective, you're better off reducing food quantity (and the proportion of highly energy dense food types) than just increasing exercise. Unless you are at marathon-levels, that is. Increasing muscle mass is also time well spent (still pales in comparison to just eating less). Need to do it for the health benefits anyway, but it's easy to see why people get frustrated.

The kind of food served must have an impact too. Most places, if you are even offered a salad, it's awful. It's either tasteless or downright nasty and you can only make it palatable by overdosing on dressings. It seems that the nastiest tasting greens are chosen - don't even get me started on the "spring mix". So many people just don't eat salad and I can't blame them. Kids are right to rebel against their vegetables.

The American-style breakfast is delicious. It's just that most options are caloric bombs.

This is obviously not applicable if you don't eat out with any regularity. But that was the norm pre-pandemic, whether it's a restaurant or a $5 meal at Taco Bell with the nastiest (but tasty to our lizard brain) calories imaginable. Given that many people in the US don't really have the habit (or the employer doesn't give them time) of having lunch, burgers and the like are common.

Fine, let's eat healthy then and stop complaining. Let's start with fruits.

... and they suck. Apples are tasteless. Bananas are terrible. Mangos are a shadow of what they are supposed to be. Some grapes are ok. Berries are good (but not cheap in most places!). And so on. Fruits seem to be selected for appearance, easy of transport and shelf life, nevermind if they taste like used cardboard. Except berries and even then, IFF they are sourced locally.

You can make a decent salad with ingredients found in any supermarket, so there's that. Less convenient - you need to make your own with tastier greens(whatever your preference is!) rather than grabbing a box of spring mix that tastes like grass that was mowed a week ago. Add some lemon, vinegar and a very small amount of salt and it's all you need.

Meat is essentially the same everywhere(barring some food regulations). Can be affordable if one is ok with eating based on what's available, as prices fluctuate like crazy.

You _can_ eat healthy in the US. But you'll be battling: affordability, time, convenience and cultural norms. You need to check the labels on everything too, the corn syrup comment is relevant.


I blame the food packaging. BPA and all sorts of synthetic hormones leeching from plastic has invaded both our food and drink.


Kids almost always eat and drink from plastic. It used to be glass and metal.

Little kids are really surrounded by lots of fresh new plastic.


I wonder how much is due to regulation about inner dosage. I hear that mcdonalds recipees varies a lot between Europe and USA, saying that USA have way more everything in it, whereas in EU limits are imposed.

That or USA citizens really like to eat overly sweet and fat stuff.


The portions at the USA are insane. When I first saw the "large size" side drinks at fast foods I started laughing. In Europe the large size is equivalent to the US Medium.

This is also the case in restaurants. I get it that many people pack left over to go, but the portions served are comically large. For someone with broken "I am full" sensor, it is easy to consume the whole portion at once, and then get a dessert.


I find that in most US restaurants the portions are a bit small and I need the desert to fill me up. People always remark about how much I eat though. Most of them completely fail to notice that I eat only at meals, so even though it seems like I'm eating a lot, over the course of a day I'm getting no more than them. However most of my calories are not empty snacks (even counting the desert).

I cook most of my meals at home though, which allows me to get enough without needing desert every meal. Plus my cooking tastes better since it is real flavor not added sugar/salt.


>When I first saw the "large size" side drinks at fast foods I started laughing. In Europe the large size is equivalent to the US Medium.

Depending on where exactly you were, this is the experience of a lot of Americans compared to the sizes from their childhoods. A lot of places missed the point on Super-Size Me and just renamed their sizes to eliminate extra-larges around that time. So a 16oz shifted from being medium to being small.


FWIW, oil prices have a really high (negative) correlation with obesity

There's weirdly enough, quite a bit of scholarly literature on this.

Here's a decent survey, scroll down to see the links

https://journalistsresource.org/studies/environment/energy/g...

There's also studies that show increasing gasoline sales tax is predictive of future obesity prevalence (see https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5415832/). The correlation appears robust enough to generally use petroleum prices as an indicator of obesity prevalence as measured through BMI.

They're all pretty careful to note that "the relationship between gasoline prices and physical activity must be empirically determined".

Maybe, for instance, people purchase less food or go out to eat less frequently in high gas-price places. (See https://onlinelibrary.wiley.com/doi/abs/10.1002/j.1550-8528....)

Maybe people spend less time commuting in high petroleum prices areas, which increases well being and decreases obesity prevalence (see https://link.springer.com/article/10.1007/s11524-012-9678-6)

Maybe petroleum-based fertilizers lead to high obesity (see https://www.cambridge.org/core/journals/british-journal-of-n...).

Maybe the psychological activity of driving affects metabolism (see https://www.sciencedirect.com/science/article/pii/S009174351...).

Maybe this is all p-hacking and it's nonsense.

Regardless, if scholarship is to be believed, moving to a place with high gas prices might help you lose weight. Yes, it still sounds nutty to me as well.


"Anything that is more than our necessity is poison. It may be power, wealth, hunger, ego, greed, laziness, love or ambition..."

Rumi


related: https://www.youtube.com/watch?v=-lkCsKXAxfo (and other videos of the series)


So you’re blaming the FDA for allowing something into American food that the EU doesn’t?


"You can read all the dating books you want, but getting in shape is the only thing that works."

I don't know my guy. I'm 39, weigh 280lbs at 5'9 but am married to a smart and beautiful women a decade younger than me and 150lbs lighter than me. It's not a sugar daddy thing either, she makes more than I do. Not everyone is shallow and a great sense of humor / shared interests / good personality is more than enough for plenty of people. That said, being fit certainly ups the odds in your favor.


A large component is the dating market you’re in.

If you’re a man in DC, NYC, or some rural town you’ll have more luck.

Bay Area? Zero chance.


Perhaps you missed the part where they controlled for "confounders—including year of study, age, race, BMI, comorbidity status, alcohol and smoking use, and level of physical activity"

So, after correcting for BMI, physical activity, etc, there was still a very significant decline in testosterone between 1999-2000 and 2015-2016.


Yeah, but a few paragraphs later, we have this:

"According to Lokeshwar, potential causes for these declines could be increased obesity/BMI, assay variations, diet/phytoestrogens, declined exercise and physical activity, fat percentage, marijuana use, and environmental toxins."

My personal, totally unsupported hypothesis: society is simply kinder and gentler now. As evidenced by the high testosterone in prison populations, this hormone responds to environmental threats of potential violence.


> My personal, totally unsupported hypothesis: society is simply kinder and gentler now.

Loved reading that. I don't know if it's true, but I hope so.


It's probably not the case that testosterone being lower is a result of society being kinder and gentler, but that society is kinder and gentler as a result of the lower testosterone.


Well, there might be a positive feedback loop factor implied, even if other factors might affect the rise of kinder society and the decrease of testosterone.

That’s funny as the first time I heard about feedback loop was in college biology courses, when we were taught how women hormones interactions are modelizable.


I didn't read it in the former way personally. Your sentence confused me at first with that assumption for you to disprove.


I see that and I'm glad they included it, but ...

Was 1999-2000 that golden age when we all threshed the fields by hand and steered the plows on foot ?

I remember people being quite sedentary and obese then and I don't know that an activity comparison to 1999-2000 has any utility ...

EDIT: OK, I am thinking about this backwards - if, as I suggest, people were just as sedentary in the first period as they are in the second, then the T drop begs a different explanation. As you suggest, they also corrected for age.

So, perhaps, my instinct is wrong. I would still look very closely at the (adjusted, corrected) physical activity before drawing any other conclusions ...


1999-2000 is a period in the past when they had measurements.

I mean ideally they'd have huge numbers of testosterone samples from all of human history, but what are they going to do?


it's a reference point? The article isn't comparing to some platonic ideal of what men's testosterone levels should be...it's just pointing out a statistically significant decrease in those levels over a period of 20 years


There is something double strange about the p values.For the main effect, the broad based decline, p < 0.0001. But for the result for men at "normal" weight, 18.5 < BMI < 24.9, the p value is given as p< 0.05.

The first strangeness is that this hints at a much weaker effect. The second strangeness is reporting the p value rather than the effect size. I clicked the link to a pdf at the bottom of the article, but it is not the paper. shrug


Something that is fairly well known in weightlifting circles is that "lifting heavy" will boost testosterone levels for about a day.

This is something I can anecdotally confirm: A few years ago my libido was low and I had borderline depression. After my lifts exceeded 100 kg (220 lb), there was a noticeable positive correlation between my libido and the deadlift days.


Yep. Lifting heavy is also good because it doesn't take very long and it's far easier to go high intensity for a few reps than medium intensity for many reps. Just gotta be careful to have proper form and not injure ourselves.


I mean, every problem in my life can be fairly neatly explained my a lack of physical activity. Most AWESOME days I have can be neatly explained by higher than usual activity.

Our bodies need to move. Isn’t there strong evidence that we can’t even function properly without exercise? I mean, basic functions like regular waste disposal/cell regeneration. Circulation is insufficient without some added pressure and agitation. All kinds of stuff.

We are too fat and lazy, period.

It’s an “easy” fix, but it’s also really, really, really hard. Man. I used to run 50km per week, now I don’t even walk 5km. So much kid stuff, work stuff, house stuff.


Stress is also linked to reduced testosterone.

Sexual behaviors can radically change testosterone as well.


That’s a reminder that the world has become more and more stressed out. I was reading somewhere that women handle stress better possibly because of estrogen.


That may be part of the explanation, but read this:

> Lokeshwar noted that even men with a normal BMI (18.5-24.9) had declining total testosterone levels (P < .05) during the same time frames.


Literally the first line from the article: “The decline in total testosterone was observed even among men with normal body mass index.”


Personal experience agrees. I'm over 50. Started lifting weights regularly about a year ago. Lost about 15-20 lbs of fat. Consuming way less beer and junk food. Have not had levels tested, but noticing more signs of increased testosterone, increased libido, waking up with an erection, etc.


"The decline in total testosterone was observed even among men with normal body mass index."


The first line in the article is: "The decline in total testosterone was observed even among men with normal body mass index." So obesity may be a factor, but it does not seem to be the only factor.


This is not so simple. Low testosterone cannot always be fixed by exercise.

There are men who exercise and yet have low T.

In the abstract of your [3] we see a problem. Quote:

> If you have a low level of fitness you are likely to have a greater increase in testosterone response to exercise. As your body adjusts to the demands of exercise the testosterone response will decrease.

Basically you have to be unfit to get a T boost from lifting some weights. If you're already fit and adapted to exercise, more exercise won't fix the T problem.


I believe this to be the right answer.

Ive been around this discussion a lot and everyone seems to want to blame the whole phenomenon on some chemical or another, "xenoestrogens" are thrown around a lot. Yes, there are more unnatural chemical compounds entering our bodies than in the past (also important to examine) but addressing the terribly unhealthy lives most of us lead is obviously the first step.


The parent comment both says that this is a global phenomenon and links to a study (not on Americans) whose _abstract_ says "There was a highly significant age-independent decline in total testosterone in the first and second decades of the twenty-first century. The decline was unlikely to be explained by increasing rates of obesity".


Study controls for this, though:

> After controlling for confounders—including year of study, age, race, BMI, comorbidity status, alcohol and smoking use, and level of physical activity—total testosterone was lower among men in the later (2011-2016) versus earlier (1999-2000) cycles (P < 0.001)


When I went to Europe in 2006 I dropped 15 pounds in 3 weeks. I was hardly obese (call it pudge) but those three weeks changed my life completely. Encouraged by the start, I began to exercise and get in shape. That lasted until a severe foot breakage kept me from running for about a year which put most of the weight back on. I noticed that in Europe where I was(Austria, Hungary, Germany) there was very little sugar in restaurant food and most of the time it resembled an elaborate home cooked meal. Here in the states sugar and high carbs for carbs sake are in everything.


They said this accounted for most of the effect.

But if you look at the study the effect persists after controlling for both BMI and exercise. There must be more to it.


I think there multiple things working together:

- High yield, less nutritious crops - Climate change - less physical activity

https://www.politico.com/agenda/story/2017/09/13/food-nutrie...


BPA acts as synthetic estrogen in the human body and therefore has a less significant but similar effect as being on female hormone therapy.

But sugar, or more specifically insulin can reduce testosterone in the blood as well. Sugar will also make you put on weight more easily and body fat will also increase estrogen.


My guess is this, but I would have to say, we need to see the data on women as well if thats the case.


> The decline in total testosterone was observed even among men with normal body mass index.


The study in OP controlled for age and weight.


It's really harmful to go around pushing the uninformed assertion that "testosterone == violence". This leads to people lashing out at men in general, then further backlash from there in the form of the "they're-coming-to-get-us" trumpian insanity that is going on right now.

The whole phenomenon of "toxic masculinity" is not about "masculinity makes you toxic" but about the ways we terrorize young males and indoctrinate them with fear & violence at an early age.

https://www.scientificamerican.com/article/strange-but-true-...


I don't mean to necessarily imply you are doing this, but I suspect "toxic masculinity" is a motte-and-bailey[0].

[0]: https://en.wikipedia.org/wiki/Motte-and-bailey_fallacy


The term has been used utterly consistently across many decades of academic writing. It is absolutely not a motte and bailey. It truly is about how many masculine-coded expectations trap men in harmful behaviors and patterns.


It's a motte and bailey in the way it's socially used. The way it goes is, people will make fun of masculinity in general, and throw around "toxic masculinity" as a meme at any display or mention of masculinity. When challenged, they retreat to the motte of claiming they mean "toxic masculinity" purely in the academic sense.


This is my first encounter with the term, so forgive me if I’m using it wring, but it feels like this convo was literally motte and bailey’d.

Op: don’t link testosterone and violence - the real problem is toxic masculinity not testosterone a thing all men have.

Someone: you’re not doing this, but toxic masculinity is a motte and bailey

Someone else: no it’s a well defined idea

You, moving the goalpost: how the term is used socially it is

If someone is using the term as you suggested, by all means call out their actions. But if they are not - as op did - why bring this up?

Personally I find the idea of toxic masculinity a useful tool to understand and categorize the things society is telling me i should aspire to, many of which are harmful to who I am personally


I thought the convo was: OP made an otherwise valid, neutral point, then bundled in a defense of a hotly contested phrase, purporting to tell us what it "really" means. jbboehr responded that this was a motte-and-bailey. UncleMeat was like, no it's not, so I tried clarifying what I thought jbboehr was getting at.


Almost every concept is used badly by some laypeople. The Heisenberg Uncertainty Principle is widely used by cranks to make all sorts of nonsense claims. That isn't the fault of the idea.

Feminist theory is a serious academic discipline that isn't just making shit up to attack men.


I would never claim “just” however I would say for an area that dovetails well with studies in micro-aggressions, context, bias, and the importance and nuance of words they are shockingly bad at naming things. Maybe you’re right maybe they dont dislike men but they tend to name shared social ills after men an awful lot...


> shockingly bad at naming things

As we all know, naming things is one of the two hardest things.


LOL! However, in that discipline I feel it is the only thing?


It's such a confusing misnomer that the majority of both proponents and opponents of it wildly misuse it all the time.

Just call it something like "toxic gender roles" or "toxic gender expectations" and you short circuit the entire debate.


I don't believe that it would actually short circuit the debate, since there is a contingent of people who insist on maximally misunderstanding work in this space.

But regardless, the name does derive from some historical reasoning. For many decades feminist theory used to consider the feminine to be aberrant and the masculine to be the cultural norm and a pure good, only investigating the ways in which femininity trapped and harmed people. "Toxic masculinity" was a re-evaluation of these assumptions, identifying ways that masculinity, like femininity could trap and harm people. The term was positioned against the assumptions of the time and "toxic masculinity" expresses this position much better than "toxic gender roles" since it was explicitly about changing how feminism thought about masculinity.

That is no longer especially significant to the term, but inertia exists.


And as we know, people never misuse academic words outside academia.

>It truly is about how many masculine-coded expectations trap men in harmful behaviors and patterns.

That's the motte. The bailey is using the term to sell expected patterns and behaviors that are not necessarily any less harmful, just more desirable to the person doing the talking.


Testosterone is linked to violence, in that stronger people tend to have higher testosterone levels and people with higher testosterone levels tend to be more aggressive. I think the whole idea of toxic masculinity is bullshit, but we shouldn't ignore obvious correlations just because they upset our ideas about how things should be.


Testosterone is also linked to a greater sense of fair play, both as the recipient and the benefactor.

https://www.scientificamerican.com/article/testosterones-eff...

https://www.newscientist.com/article/dn12191-hormones-affect...

The concept of testosterone=aggression is damagingly simplistic, and should not be held up as a good model.


Yes, I'm not in disagreement with this. I also don't think aggression is a negative trait.


>>Tesosterone is also linked to a greater sense of fair play, both as the recipient and the benefact

I speculate that is likely why libertarianism is the most male-dominated political ideology, and its adherents have the highest income levels.

Testosterone could also explain why libertarians are the most-rational/least-emotional of the political typologies:

https://pubmed.ncbi.nlm.nih.gov/22927928/


Ah no. Libertarianism is dominated by men precisely because it primarily attracts those with high incomes, and men have higher incomes in general.

It also attracts people with an egotistical streak and those with low empathy, plus those with a high confidence in their own rationality.

They did not become all of those things by being libertarian, they became libertarians because that ideology attracts people who are comfortable in life and focus more on individual personal gain than on an empathetic society that benefits everyone more equally.


I know it's entirely anecdotal, but I was a hardcore libertarian long before I had any income. There are literally Youtube videos of me from way back in a run down apartment, espousing libertarianism.

>>It also attracts people with an egotistical streak and those with low empathy

High ego and low empathy is also correlated with testosterone.

The silver lining is the sense of fair play mentioned by the parent comment, as well as imperviousness to superficial peripheral traits that appeal to emotion.

I remember reading that libertarianism appeals to the stereotypically male mind, but I don't know if the studies that conclusion was based on controlled for income.


That "sense of fair play" only applies when "fair" is defined as something that adheres to the libertarian's personal definition of what is rational.

Die hard libertarians in my circle of acquaintances have argued against stores hiding away tobacco products to discourage smoking as irrational, because they see making as much profit as possible as the only rational objective.

When you can define anything you personally believe in to be rational, all your opponents automatically become irrational because they disagree with your enlightened position. Since they are irrational, their arguments can be dismissed out of hand.

It is an extremely arrogant worldview. Believing that it makes you impervious to emotional arguments just makes it even more arrogant.


The commitment to fair play was found to be correlated with testosterone. It's only my speculation that this is what draws men to libertarianism.

>"fair" is defined as something that adheres to the libertarian's personal definition of what is rational.

Do you have any kind of scientific evidence supporting this hypothesis, or is it just speculation based on intuition and observations of personal acquaintances?

>>When you can define anything you personally believe in to be rational, all your opponents automatically become irrational because they disagree with your enlightened position.

It's tautological that a person will view beliefs that they personally view as rational/right, as rational/right. This is irrespective of their political ideology.

As for arrogance, I think "live and let live" is the least arrogant political philosophy one can hold, and that's the defining ethos of libertarianism. I think that lack of pretence/arrogance in this ethos is what draws people to libertarianism.

Any non-libertarian political persuasion will advocate for all manner of government measures that use force against peaceful people to force compliance with a larger social plan.

I personally don't see how the person opposing this sort of mandate is arrogant, while the person advocating for it is not. But I guess these issues are subjective.

>>Believing that it makes you impervious to emotional arguments just makes it even more arrogant.

From what I recall, the study found that libertarians are less likely to pay attention and give weight to peripheral cues that appeal to emotion, and be more focused on substance.


> "As for arrogance, I think "live and let live" is the least arrogant political philosophy one can hold, and that's the defining ethos of libertarianism. I think that lack of pretence/arrogance in this ethos is what draws people to libertarianism.

Any non-libertarian political persuasion will advocate for all manner of government measures that use force against peaceful people to force compliance with a larger social plan."

If you were talking about the original socialist libertarianism, then you would have had a point.

Unfortunately libertarianism today is more of a "live and let die"-type ideology, where those who cannot support themselves must fail, as they provide "no value". It is social darwinism writ large.

Regulations exist for a reason and the effects of gutting for instance the EPA has massive consequences, irreparable damage to the environment and to people's health. Or do you think the people in Flint, Michigan should just move somewhere else?

We absolutely cannot trust powerful people and corporations to do the right thing, since they do not feel the consequences themselves and thus actively do not care, because that would eat into their profits.

Voluntarism doesn't work, for that exact reason. Hence why regulations and laws are needed.


>>Unfortunately libertarianism today is more of a "live and let die"-type ideology, where those who cannot support themselves must fail, as they provide "no value". It is social darwinism writ large.

Altruism is completely orthogonal to libertarianism. The only consistent property of libertarian policies is that they protect and preserve the right to voluntary interaction.

How people choose to voluntarily associate is in no way a concern of what's defined as libertarianism.

In other words, one can believe and promote a society based on compassion, sharing and collectivism, or a society based on self-sufficiency and only profit-motivated interaction, and be equally libertarian.

>>the effects of gutting for instance the EPA has massive consequences, irreparable damage to the environment and to people's health. Or do you think the people in Flint, Michigan should just move somewhere else?

There are a multitude of types of regulations, and not all of them violate the non-aggression moral principle that libertarianism holds as inviolable. Environmental regulations generally do not violate the right to free association, and can indeed protect rights, so are generally consistent with libertarianism.

Moreover, regulations have a multitude of effects, and not all of them positive. To quantify their net effect on human welfare requires far more evidence than the single data point you've provided. It requires a comprehensive and methodological accounting of their entire impact.

>>Voluntarism doesn't work, for that exact reason. Hence why regulations and laws are needed.

Voluntarism does not imply a lack of laws. Voluntaryism can only be enforced with laws and a state to back it. There is a distinction between laws that protect people's right to their life, liberty and property, and laws that violate it.


Define the NAP, please. Put it in no uncertain terms.

It always boils down to "doing something I agree with", defining any perceived violation of ultimate personal freedom as aggression, leading to any retaliation to be "justified" as self defense, which is utterly morally bereft.

The pure and simple truth is that a society based solely on voluntary interaction is no society at all. Along with the benefits of being part of a society, there will always be obligations. You can act as if that doesn't apply to you, but someone always has to pick up the bill or do the work and you can't count on there always being a volunteer.

Libertarianism is a pie-in-the-sky utopian thought experiment ideology.


That's such a huge dismissal of a very rationally and logically justifiable moral position.


That "moral position" never explains what happens to those that don't congregate well, are not high performers, etc.


It does explain it. It just argues, correctly in my opinion, that it would be unfair to force an unrelated person to help that person in need.

Libertarianism posits that all interactions between people should be voluntary, and that the misfortune of one does not justify coercive measures against another.


Thus it is only an attractive ideology for those without a conscience or empathy.


Not emotional does not guarantee rational.

Rational does not guarantee correct, if you don't consider all the variables.

Anecdotally, I find Libertarians are just as susceptible as people of all political parties of being selective with arguments that support their points of view, and ignoring others.

What is unique to Libertarians I know is an arrogance about the objective correctness (because of their lack of emotion and rationality) of their philosophy.


Libertarians are only slightly more rational than liberals. Both are significantly more rational and less emotional than conservatives.

>>Rational does not guarantee correct, if you don't consider all the variables.

Of course, but a rational mindset is more likely to base its beliefs on evidence and logically sound suppositions, and thus be correct, than an emotional one.

>>What is unique to Libertarians I know is an arrogance about the objective correctness (because of their lack of emotion and rationality) of their philosophy.

I think the willingness of adherents of non-libertarian ideologies to use the force of the state to force peaceful people to bend to their will reveals a greater arrogance. I find "live and let live" to show the greatest humility, but I suppose this is all subjective.


> Libertarians are only slightly more rational than liberals. Both are significantly more rational and less emotional than conservatives.

What is your basis for that claim? Go on r/conservative and you’ll see plenty claiming the opposite.


According to this study, Figure 4:

https://pubmed.ncbi.nlm.nih.gov/22927928/


What’s the basis for saying that’s “significant”?

(Genuine question — I’m not familiar with the metric and the differences seem small)


That's how the study described it IIRC.


I want to first mention that both violence and aggression is defined in term of culture and as such is a difficult subject for researcher to define in studies.

The link between aggression and testosterone in modern studies is a complicated one. The theory that testosterone levels can be used as a predictor for violence has been extensively debunked. However violence is a predictor for high testosterone, a finding mostly done on apes. The prevailing theory, as far as I seen in modern research, is the challenge hypothesis. If two males fight, the winner of the two will have raised testosterone afterward. The winner will also be more likely to be more vigorous defending themselves if their new won status is challenged.

On a more subtle human experience, place people in a economic game and inject some with testosterone. What ever behavior that the game has in order to defend status will be increased in those injected. If status is preserved by giving money, those injected with testosterone become more generous.

A similar study has been done on sport fans. When a team wins a match, male fans of that team will have their testosterone raised afterward. If there is a confrontation between fans of the two different teams, it is more likely that the winning side will react more aggressively.

Talking about toxic behavior, there is also a similar finding for women. It is however a bit more complicated and involve multiple hormones. The aggression is also more complicated, harder to define, and is more context sensitive.


[citation needed]

There is plenty of scientific research on the topic. "Testosterone == violence" is plain wrong. In some papers, partial correlation was indicated.

The belief that testosterone is some sort of "manly warrior hormone" is an example of cultural bias that has been researched as well (see google scholar) and fits very well the description of "toxic masculinity".


It looks like it's more complex than just testosterone, but there is a link between testosterone and risk-aversion: https://www.sciencedirect.com/science/article/pii/S1570677X1...

There's a biological basis for men being less risk-averse than women. If you think about cavemen days, as a woman, if you are pregnant, or could be pregnant, going hunting, making physical threats, or taking unnecessary risks will reduce your chances of reproductive success. It's better to be safe and conservative, because the life of your children could be at stake.

As a male, in primitive times, it was the opposite. Obviously it wouldn't be to your advantage to just pick fights with everyone, but there is much more of a competitive dynamic. The men who go out, hunt, and bring the food, will have more success within their tribes. In order to succeed as a caveman, you had to leave the camp in a hunting party and risk getting killed.

AFAIK, based on studies on mitochondrial DNA, we have 2-3x female ancestors as males. Meaning most males died childless. This is obviously not a model for how we want modern society to be, but I think it's healthy to understand where we come form, and why males may have more of a tendency for violence, or to get themselves killed in motorcycle accidents. It's not just because of socialization. There is a biological basis.


Quoting a single study? And with only 12 citations...


You didn't refute what I said at all. Testosterone levels are linked to violent behavior. This is very clear in the literature. Does it mean everyone with high testosterone levels is violent? Obviously not. And violence is not always a bad trait either. I don't believe in toxic masculinity. Masculine and feminine traits have their place and are obviously adaptive in different situations.


> You didn't refute what I said at all.

And I don't intend to. The topic is big enough for a degree and specialization in endocrinology.

I recommend to read the books from https://en.wikipedia.org/wiki/Robert_Sapolsky or at the very least watch all his lectures on youtube.

> I don't believe in toxic masculinity. Masculine and feminine traits have

You are confusing "toxic masculinity" with "masculinity is toxic"

"toxic work culture" does not mean "work is toxic"


I'm not confusing the two. I don't think "toxic masculinity" is a meaningful concept.


Testosterone arouses brain areas for aggression and muscle development (in humans and other animals). Masculinity is a different topic.

It doesn't "===" violence but if you're intentionally using "==" for type coercion, it could be true.


Interestingly, js usage steadily increased over the same time period.


Ladies and gentleman, we got him.


> I wonder if this is actually a manifestation of population-wide testosterone drop.

Is it possible for the cause-and-effect to be backwards? A change in socially acceptable behavior causing the testosterone drop?


This is an interesting hypothesis. The silver fox domestication experiment shows that selecting for behavioral traits can result in significant changes to physical traits as well: https://evolution-outreach.biomedcentral.com/articles/10.118...


Cultural psychology could have been changing too. Rates of corporeal punishment going down resulting in less violent behavior. Data in this study shows a 30 percentage point drop in rates of spanking, and every study done on spanking has shown it is at best neutral but commonly creates negative outcomes

http://unh.edu/ccrc/pdf/CV358%20-%20Published%202019.pdf


I much prefer incorporeal punishment. When the ghost tries to whack you, you just act like it hurts and you're good


Key word there being “selecting”, which makes this a pretty implausible explanation for something we can observe over a couple decades.


Unless production is controlled by the environment rather than strictly genetic factors.

This wouldn't be a genetic argument then.


So then totally irrelevant to the silver fox experiment.


Hormone production is something that the body controls. It doesn't require multiple generations or genetic selection.


I don't get what you're saying, every phenotype is something "that the body controls."


The point is that it's not a genetically determined effect.

Testosterone in your body fluctuates throughout the course of a single day, based on what happens to you in that day.

So at a societal level, we'd expect some general zeitgeist based average to fall out of other factors, potentially.


This only makes sense if your underlying assumption is that the less violent are reproducing more offspring now. Your reference study merely shows that the phenotypical traits have a strong correlation with the behavior traits (in at least foxes). This selection requires offspring but its seems the parent is referencing a hormonal change due to social behavior.

I agree with the premise, that social and environmental norms can influence hormones, but the fox study is a different phenomenon altogether.


>This only makes sense if your underlying assumption is that the less violent are reproducing more offspring now.

I wouldn't rule it out. After a generation of anti-bullying and zero tolerance schools have gotten pretty good at making sure anyone with even the slightest violent tendencies is primed to be caught up in "the system" by the time they're done and we've thrown the "fuck the government I smoke what I want" crowd in prison.


Agreed. I wouldn't rule it out for mid to long term trends.

Estrogen emulating particles [1] are a candidate considering the short time intervals from article.

[1] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3222987/


That was my first thought. Inspired by hazy memories of some 20 year old episode of This American Life talking about (IIRC, which I probably don't) men's blood testosterone levels rising when they engage in aggressive behavior or take part in competitive activities.


The most likely episode is #220, "Testosterone": https://www.thisamericanlife.org/220


I was curious if this related to myself sitting on a couch playing multiplayer games. Apparently it even relates to chess, so the activity doesn't need to be physical. I wonder if being "in person" makes a big difference though.

https://www.jstor.org/stable/2786687?seq=1


I don't think drunken bar fights was ever socially acceptable anywhere but the lowest of social strata. I'd blame lifestyle changes and BPA far before I thought exercising normal "gentlemanly" restraint caused T to dip. Also, your theory doesn't explain the anomaly of all the large muscular men who you can tell by physical appearance have high T and who are very kind and not aggressive. Bar fights have a lot more to do with environmental factors that influence behavior, like how they were raised, the same socioeconomic factors that contribute to violent crime, etc.


> doesn't explain the anomaly of all the large muscular men who you can tell by physical appearance have high T and who are very kind and not aggressive.

I don't know the numbers, but that would mean that high T does not cause aggression, not that aggression does not cause high T.


Bodybuilders think high estrogen levels cause roid rage. Might be lies they tell themselves, might be a valid observation.

On the other hand normal levels testosterone supposedly saturate receptors. Big exception is muscles.


> Also, your theory doesn't explain the anomaly of all the large muscular men who you can tell by physical appearance have high T and who are very kind and not aggressive.

I don't think higher levels of testosterone have been reliably linked to aggressive behaviour except in case of anabolic steroid abuse. Those kind people might well have high levels of testosterone.


> I don't think drunken bar fights was ever socially acceptable anywhere but the lowest of social strata.

Not how it fits in the discussion, but I'd put duelling in the same category, and this was clearly acceptable among elites when it was acceptable overall


Is it really similar? Duels would be scheduled in advanced. There would be rules to be followed. I don't think I ever read about a duel involving fisticuffs. I suppose you could be saying that a duel is the posh version of a drunken bar fight, but that's like saying that a moderated debate is the posh version of a profanity filled screaming match in a bar parking lot.


Even when dueling was considered acceptable upper-class behavior, most men never fought a duel. It was a drastic, last-resort kind of affair. And even when duels did occur, the duelists sometimes just went through the motions for honor's sake rather than shooting to kill.


Its also very likely that this all matches up with the creation and then banning of leaded fuels in cars.


> Is it possible for the cause-and-effect to be backwards? A change in socially acceptable behavior causing the testosterone drop?

How exactly do you propose that a change in socially acceptable behavior in the span of about 40 years had a tangible effect on hormone levels? It's not like someone can say "oh getting into fistfights isn't cool anymore, better reduce my testosterone levels". Maybe if we were talking about a timespan an order of magnitude or two longer then sexual selection (high testosterone and more violent men being less favored as mates) could come into play, but again for a time span of 40-50 years that's just not feasible. Also, socially acceptable or not, violent and aggressive men typically don't have problems finding sexual partners; Ted Bundy, the notorious serial killer and rapist, was known to receive many love-letters in prison, even after the details of his crimes (exclusively against women and girls) were made public and he was able to marry and conceive a child while incarcerated.


It sounds like you're assuming evolutionary pressure as a mechanism of change, is that correct?

Have you considered that the body may produce different hormone levels as a result of our mental state?

For example, when startled, the body produces a hormone called adrenaline. We know with certainty that mental state is responsible for certain types of hormone production.

I honestly do not know if there might be a link between testosterone production specifically and mental state, but I took this to be the question that the above poster was asking.


I believe there was a study that found that sports fans' testosterone levels were lower after their preferred team lost.


Apparently exercise can increase testosterone, which implies fistfights (especially frequent ones) would too; however, this article also says obesity can reduce testosterone, and I suspect that is a bigger factor:

https://www.webmd.com/men/features/exercise-and-testosterone


Lower testosterone probably causes fat gain too. It wouldn’t surprise me if we eventually find out that something environmental is causing both of those phenomena.


https://pubmed.ncbi.nlm.nih.gov/25982085/

Lower testosterone causes fat gain and fat gain causes lower testosterone.

https://simondsmetabolics.com/2020/09/10/how-obesity-affects...

> Scientists have established that excess fat increases enzymes known as aromatases. These molecules convert testosterone into estrogen. While estrogen is present in males in very small amounts, increased amounts can alter normal function. Having too much estrogen tricks the body into thinking that you do not need more testosterone. The danger lies in the vicious cycle that develops once the high estrogen levels kick in.

Cheap, high calorie food and obesity...


> It's not like someone can say "oh getting into fistfights isn't cool anymore, better reduce my testosterone levels".

I was actually considering something like that. That if you engage in more aggressive behavior regularly for a long period of time, your testosterone levels might stay higher on average than if you didn't.


Tons of factors influence hormone levels. There's nothing strange about thinking widespread social patterns and physical changes in the environment (diet, air pollution, etc) could lead to widespread hormonal changes within a population.

You seem to assume testosterone levels are only a function of genetics, which they are not.



I'm a similar age. Do school fights still happen? Circa 12-15 years old, these were a normal part of being a boy. There was even a spot outside the school where boys waited for other boys they wanted to fight. Several boys would be there on any given day. There were enough fights that everyone knew where everyone stood in the "rankings." Who you could beat and who you couldn't... says a lot considering how fast kids grow at that age.

I didn't go to a very violent school, and fights got rarer as age made them more serious. My parents also treated it as normal. They didn't encourage it, but it wasn't a major outrage. Schools too. A note to parents or somesuch minor penalty was the usual recourse.


The Columbine happened in April 1999 and dominated the news cycle for a long time. It likely had a big impact on a generation of American kids. Kids that would otherwise have proceeded straight to a fistfight may have had second thoughts in case the person attacked showed up the next day with a rifle.

As for later years, schools took a zero-tolerance policy, so that would have cut down on it significantly. With social media use increasing towards the end of the 2000s, fights could have been reduced further because people did not want to end up as a punchline (no pun intended) on Worldstar or Vine.


This is probably the answer right here. Fighting now means you'll have video fight evidence gathered from multiple angles, backed up to the cloud, and then potentially used as a societal-attack on you and your family, potentially for years or into perpetuity.


good answer. cheers.


I’m a similar age and in comparison you went to an extremely violent school particularly if adults were treating it as normal!

I experienced way more violence in my late teens and early twenties thanks to drinking in dodgy towns.


Different culture, that is all.

If you read Mark Twain's Tom Sawyer and Huck Fin, boys fighting, even if they just met seemed to be part of life.

> The summer evenings were long. It was not dark, yet. Presently Tom checked his whistle. A stranger was before him—a boy a shade larger than himself. A new-comer of any age or either sex was an im-pressive curiosity in the poor little shabby village of St. Petersburg. This boy was well dressed, too—well dressed on a week-day. This was simply astounding. His cap was a dainty thing, his close-buttoned blue cloth roundabout was new and natty, and so were his pantaloons. He had shoes on—and it was only Friday. He even wore a necktie, a bright bit of ribbon. He had a citified air about him that ate into Tom’s vitals. The more Tom stared at the splendid marvel, the higher he turned up his nose at his finery and the shabbier and shabbier his own outfit seemed to him to grow. Neither boy spoke. If one moved, the other moved—but only sidewise, in a circle; they kept face to face and eye to eye all the time. Finally Tom said: “I can lick you!”

http://www.gutenberg.org/files/74/74-h/74-h.htm#c1

I'm not from that culture myself but I know people who are.


Fighting is one mechanism for establishing the social order of a group. So in the absence of some way of ranking people, people will eventually devolve to fist fights to determine who is boss.


Same age, grew up in the rural southern US and this was my experience in middle and high school. Lots of fighting. Everyone who wanted to "be somebody" was under pressure to participate in it. Winning meant advancing in social rank. At some point the school cracked down and the suspension for fighting was 10 days. After that it was lots of meeting people at such and such location after school or at some party on Friday night to settle things.

Definitely tapered off the last couple years of high school, but some of the rougher kids continued to engage it. Those kids pretty quickly got into serious enough trouble that they ended up in jail, expelled, on probation. That quieted things down a good bit.


I think the problem is now, school fights are handled by actual police, so there's very severe consequences, as in criminal records, not just a suspension. So its likely no tolerance policy removes these kids or ruins their lives.


Yeah, in the latter years of high school, I saw a number of fights end in handcuffs.


Zero-tolerance policies (suspension or expulsion are quick), Columbine (fear of revenge via a gun), and cellphones with cameras killed "for fun"/random school fights. School kids in general had way more leeway before the late 90s.


I'm 33 but grew up in a developing nation. This was common starting at around age 8. The boys fought pretty much every week. Exactly like you describe, there were rankings, within the class and in the larger grade.

This was common for other people who I met later that from developing nations. Not sure if this still happens anymore.


Probably lead.

https://www.motherjones.com/kevin-drum/2018/02/an-updated-le...

[ EDIT for the downvoters: this isn't a joke or some snide remark. The lead hypothesis as the basis for the huge spike in violence in various societies, especially among teenagers and young adults, has huge amounts of evidence. Correlation is not causation, but we even have a plausible causal mechanism. ]


It probably depended on where you were. I attended grade school in the US in the 1990s and got into only one “fight” where punches were thrown. No teachers were around but there would have been punishment had it been reported.


Middle/High School in the mid-late 80's here.

Fights were not uncommon. I saw probably 8 or 10 inside school and a handful more after school at designated spots over 4 years in high school.

It was a suspension offense but no police or record was involved.

I won't go into details about my involvement in any school fights, but there were 2 incidents with tormentors at new schools that were quickly resolved and I lived in peace thereafter nor do I regret my actions. Besides I was like 8 and 11 years old at those times.

I don't think those "rougher" times were good and I'm glad there is less of that now. Still (and this might be personal bias), I can't help feeling like we lost something in the sense there is a fundamental underlying biological reality and people are shocked when they find out it actually exists underneath everything and people are more balanced if they learn this at an emotional level early.

I think these are the conditions we evolved under (constant threat of violence and need to deal with it) so even though it's not good and people got hurt and killed needlessly, we are somewhat adapted to that and changing the circumstances makes us a bit neurotic. Or something along those lines.


High school late 80s would have been the peak of the blood lead problem and the age where the aggressive behaviors are most evident.


I would suspect if one looked back in history to pre-industrial times, there were even more fights in that age group.

Without lead.


Similar age group as you and also in the US. I can recall a single fight in school, and I honestly don't think any real punches thrown; it was more of a stand off with light hitting that died down quicker than it started.


Same, late 80s/early 90s. I had one altercation in 2nd (?) grade where we mostly just pushed each other around and then wrestled on the ground. I can think of a couple times people got in each others faces in high school, but no knock-down-drag-out fights to speak of.

It's so weird that someone would say they didn't go to a violent school, but there were constant fights. Violence doesn't mean "weekly school shootings."


Maybe its a US thing? Grew up in the Soviet Block Countries, and fighting was very looked down on.

I did encounter some, but it was more like we as kids watched a lot of US media and thought this was how we needed to behave but were more “playing at it” than actually being vindictive.

My one fight in school was with the “toughest” kid in my age group (I was the nerdy outsider they were bonding over to defeat), we duked it out in the yard with half of the school watching, and didn’t get a clear winner. We both got tired and called it quits.

Both got reprimanded of course. Weirdly enough that was the most violence I’ve encountered in my life, period.

I blame video games. Aggressive teens got an outlet where they can establish rankings, troll, be dicks, or defend others, with zero parent supervision.

In my case, since it was done in computer cafes, it had its strong social aspect, with crowds cheering, gangs and clans. Counter Strike was more of a religion to us than anything. And it was so much fun that we didn’t really need “the real thing”.


Looked down on? Must've been a good school, or maybe even country.

Fights and bullying were extremely common in my schools (went to several), though they were the standard public ones (I'm not even sure there were private schools at the time). Late 90s to very early 00's.

I see nowadays it's much less common, as kids are all on smartphones, they've got no time for any physical activities. Silver linings, I guess. Kids still exclude the less "cool" ones, but at least no one (or fewer of them) gets spit on and beaten up.


I've seen kids get expelled for getting in fights, even off-campus on their own time. That kind of stuff simply isn't tolerated anymore.


I was in HS from 04-08. I can recall maybe one fight that teachers would break up a year. The people who got in them were not praised as tough guys, but idiots to be mocked.


Grew up in USSR and Israel. Nothing even close to it.


this was in raanana, early 90s.


netanya, 93-97 in worst high school of the city. those that were expelled from it, next stop was a cross between school and juvie.

fights were few and between. those that i remember had ethnic background.


Really?! I guess we got different samples. I don't recall many/any ethnic based stuff, olice intervention and I don't even know of anyone who went to juvie.. or even to court. I do know some kids who went to pnimiya over this kind of thing... but that was parents not authorities.

Same years, 5km apart, different experiences. ...Maybe just a different recollection of the experiences.


we probably misunderstood one each other - i though that you wrote that you had fights in raanana :) in general it was totally peaceful in netanya, no "testosterone measurements" with exception of couple of big fights that did get police involvement


I did. There were fights around that age, middle school. I just noted that repercussions were mild at the time. I definitely don't remember police involvement in kid affairs until high school, and even then it wasn't about violence.

I don't think it's that way anymore.


well, those couple of fights that i talk about, were massive. kids from other schools in city arrived in following days "to show presence". so there were some police. (i am describing high school, grades 9-12). but in daily life, there were no fights that I remember.


Do you mean that the fighters were of an ethnic minority that apparently had a higher cultural acceptance of violence, or that the fights were ethnic conflicts?


it was "russians" vs "maroccans" (actually all of them jews). fights were between kids that were troublemakers anyway on either side of equation. usually as follow up to some slur like "dirty russian" and whatever could be thrown into other direction. but there were only like 2 or 3 of those fights over 4 years in school. rest of time it was quiet


From what I've noticed, everyone's on their smartphones, too busy for physical activities of any kind.


They still do happen indeed, but the penalty can be much higher.


I think its just a sedentary lifestyle with poor diet causing much of this. Almost all well paying jobs require you to sit motionless(well almost motionless - typing) in a chair 80% of the working day, couple that with fast food and cheap processed food everywhere, voila, you have a health crisis of obesity and low testosterone.


It's too complex of a phenomenon to reduce to one, singular explanation.

However, increasingly sedentary lifestyles are definitely part of the problem. Jobs encourage people to sit motionless, of course, but most of our leisure time has been replaced by other motionless activities.

Global obesity rates have also been rising steadily while testosterone levels have trended downward. Obesity is well known to reduce testosterone levels.

There might be additional answers in environmental toxicities, but it's a mistake to ignore the elephant in the room: Lifestyle is a problem.


Well paid people have substantially lower obesity rates than poorly paid people.


Regardless of whether it's true, I don't see how this is relevant. The parent wasn't saying it's better to be poor, they're saying it's not helpful to not move. If you had a high paying, physically active job that you could do without injury, it would be better for you than any of the other combinations of pay ranking and level of activity. Likewise if the cultural ideal at the top was not decreased activity. If everyone had sedentary jobs and the cheapest food was the worst for you, you'd probably expect those with a surplus of money to be able to compensate better. Those without the need to compensate will be better off, but rich sedentary people will still need to.


They are normal weight but often very unfit.


They are on average more fit than poorer people.


There's a very credible argument that decreasing lead exposure over the last few decades (banning leaded gasoline) has driven a large portion of the decrease in violent crime.

Decreasing testosterone could also be a contributor, but it's unlikely to be as significant a factor from what I can tell.

See e.g. https://en.wikipedia.org/wiki/Lead%E2%80%93crime_hypothesis or https://www.motherjones.com/kevin-drum/2018/02/an-updated-le....


There is a large amount of circumstantial evidence that the plasticizers used to replace BPA, which lowers testosterone in men, also lower testosterone, and are simply less well studied.

Combined with the increased use of bottled water, takeout in plastic containers, tupperware, and other food-related uses, and the new prevalence of microplastics in our environment, it's easy to imagine this has a global effect on men's testosterone levels.


Violent crime in the US has been dropping for some time now. Reduction of environmental lead (gas and paint) is one of the factors as well. https://www.medicaldaily.com/leaded-gasoline-linked-rise-and...

Also I would guess that at 42 you are much less likely to be in a situation where a physical fight might start than you were in the 1990s - at bars at 2am for example. I know that I am.


Yes, this would be my first suspicion too, especially for a comparison with the 1990s.

> For instance, the peak in leaded gasoline use in the late 1970's corresponds to a peak in aggravated assault rates in the late 1990's in urban areas across the United States.

https://en.wikipedia.org/wiki/Lead_poisoning#Violence


I wonder if this could be the causal link between the two that has always been missing, lead -> higher testosterone -> more violence.


I've read that fatty tissue in the body triggers an increase in estrogen production, and that obesity can thus trigger a vicious cycle (insofar as estrogen triggers an increase in fatty tissue). Certainly, exposure to plastics and other environmental factors might increase estrogen levels alone, but given that we know that people (everywhere, I think) are fatter than they used to be, and that this seems significantly due to their being more sedentary and having worse diets (more processed foods, etc.), isn't that a plausible simple explanation? (Or at least one worth rigorously analyzing?)


> plausible simple explanation

Yes, and they address this in the study. They controlled for BMI, among other confounding variables.


Yup, I should have read the article -- thanks


Their BMI range is wide


Indeed. A very short book that covers estrogen blockers and talks about these issues is "The Anti-Estrogenic Diet", by Ori Hofmekler.


What is the process for determining long-term safety of new substances that might end up in the environment? Ah right, just use them until problems show up, then try to deny and hide the problems for a few more years. It would not surprise me at all if even in the absence of a smoking gun there are simply a lot of endocrine disruptors at low (even within safe limits, individually) dosages working simultaneously.


I recently had blood work done bc I thought I might be low T and mine was actually over the high band. I am a pretty serious hobby jogger. I run every day and I try and follow something close to what a serious HS runner would do. Is that why, or enough to explain it? Idk, but I do know if I didn’t exercise to compensate for screen-life, everything would be fucked


It's even possible, I imagine, that it's the reverse... Perhaps testosterone production is increased by a toxin or stressor that our ancestors were exposed to but we managed to minimize.


> These days even drunk young guys seem to be content with hurling a few insults.

I think there is a strong cultural influence for that. I'm from Spain and in my country drunk fighting is something that mostly British and German tourist do. We don't understand why, we may get super drunk and have super heated arguments, but it's quite uncommon we will get to a physical fight. But in the areas around the Mediterranean Sea full of tourists, fights are a daily occurrence.


T levels also depend on where one grows up rather than where they end up living: https://www.everydayhealth.com/mens-health/where-men-spend-t...

Does this research provide any insight into why testosterone levels have been in steady decline in the United States for several decades? If a safer, less-challenging environment leads to higher testosterone levels, wouldn’t levels be rising instead of falling?

Magid points to trends toward higher rates of obesity and lower rates of smoking that at least partially explain lower levels of testosterone. “There are a number of theories why this might be occurring, and there are those who dispute whether this is either a real trend or what it could mean for male health in the long term,” he says.


Cameras everywhere make for easy criminal records so people throw punches less these days.


Yup, why go around and publicly make a fool of yourself when you can do that anonymously online?


Conversely, I regularly test as testosterone deficient but I’ve got some muscle (under a dad bod) and would describe myself as pretty aggressive (but try and remain peaceful and burn aggression in BJJ.)

I am wondering if our current understanding of testosterone traits is wrong, or perhaps my understanding is wrong?

Edit: I’m a little older than you.


Presumably there are other factors, but I'm pretty sure testosterone correlates with aggressive traits, sex drive and other similar aspects, most definitely.

You can have muscle if you have low testosterone, but it will develop slower compared to if you had higher testosterone.


My gut is saying : plastic.


microplastics invaded the water supplies. fast food restaurants delivering diabetes to the masses with little scrutiny while enjoying a number of subsidies for commodities (namely sugar). O&G polluting our oceans with oil spills, destroying our air quality. chemical companies dumping their toxic waste into our land/water and delivering poisonous products (pfoas, "c8") that end up in our bodies and serve as "endocrine disruptors." our food is covered in pesticides, nitrates, and various preservatives.

take your pick.


I remember in 4 Hour Body Tim Ferris experimented with no longer storing his phone in his pocket (used an arm band instead) and it boosted his sperm count by a ton.


Anecdote: My phone has been on my desk for a year now and I feel like I should get tested for low testosterone. I will say however, my sperm count is probably fine seeing as my wife got pregnant during lockdown.


I believe its sugar and caffeine which are so popular in today's world. Caffeine and sugar both raise cortisol which leads to decreased testosterones levels.

https://news.utexas.edu/2010/09/27/stress-hormone-blocks-tes...


>>>> Possible toxicity of something that we deem safe could be an explanation.

Probably a minor contributor. As the paper states:

According to Lokeshwar, potential causes for these declines could be increased obesity/BMI, assay variations, diet/phytoestrogens, declined exercise and physical activity, fat percentage, marijuana use, and environmental toxins.

More like lifestyle changes.


> Getting into physical fight was much more common than today

This is something I often think about. I think we (as a society) have lost a certain something by the reduction of violence. I'm not advocating for violence here or anything, but sometimes a knuckle to the face is the lesser of two evils. We hardly ever see "regular" violence anymore, by which I mean the occasional fistfight. When violence is brought to our attention, it's using knives, guns or bombs. I think in a way we've become so afraid of getting punched in the teeth that we've now collectively become afraid of standing up to people. Only the police are allowed to execute violence, and in handing over that responsibility we've lost some of our guts.

Some anecdata: Years ago, I was witness to an attempted robbery in a restaurant. Some idiot came in and threatened the owner with a bottle. The place was packed, but everyone suddenly found something else more interesting to look at ("ooh, I'm wearing new shoes", "ooh, there's some fries on my plate"). No one got involved, because 20+ people were afraid of one idiot with a bottle. I grabbed him by the scruff of the neck and threw him out while the owner snatched the bottle out of his hands. We held on to him until the cops showed up. But no one else did jack shit. No one even asked if the owner was ok or anything. My faith in humanity took a deep dive that day.

Something tells me that had this happened 100 years ago, a lot more people would have been willing to get involved.

TL;DR; Exposure to small-time violence might help us feel safer and be more responsible adults.


Contrary to popular belief, testosterone doesn’t cause males to rage and become violent.


citation?

I keep finding stuff that links psychological aggression and testosterone in men, but only loosely -- i'd like to read something contrary to that if you have it. [0]:

[0]: https://thepsychologist.bps.org.uk/volume-22/edition-1/testo...


There is a pretty good talk by Robert Sapolsky on the subject, and as a researcher he did a meta study in the subject. If you want to fast forward, 30:15 is a good place to start.

https://youtu.be/2bnSY4L3V8s?t=1815

To summarize in text, Testosterone does not cause aggression. It amplify existing defensive behavior in the context of a persons social status being challenged. A person that has high status, or more significantly gains social status, also trigger higher levels of Testosterone. In turn Testosterone increases behavior which in the cultural context maintain that new won status.


> getting into physical fight was much more common than today.

You also largely got away with it back then too.

When I was in school, so long as you didn't hurt the other person too badly, the punishment for fighting was generally getting thrown into a room with all the other bad kids and forced to sit in silence for the entire school day. If you did it too much, they'd eventually expel you, but I only remember this happening to a few people.

Today, I'm pretty sure you end up getting your ass beat by the cops before getting thrown into juvie.

Edit: plus, we have video games today.


I was listening to a US podcast the other day, and I heard that some police and army recruits have never been in a fist fight in their life. Completely different to my school experience in the 80's.

Not sure if the US Army do anything similar to this but it would be a bit of a shock to the system: https://en.wikipedia.org/wiki/Milling_(military_training_exe...


This could also be explained by phasing out of lead-based paints.


No, I believe this is due to the phase-out of leaded gasoline.

Interesting graph here: https://ichef.bbci.co.uk/news/976/media/images/74298000/gif/...


I wonder if it has anything to do with the high EMF environment people live in these days. The timeline certainly correlates.

https://www.sciencedirect.com/science/article/pii/S230505001...


Obesity is mostly to blame. Fat cells kill humans by harvesting resources and messing up hormones.

https://twitter.com/search?q=%22from:Royal_arse%20Adipocytes...


They controlled for that.


>Possible toxicity of something that we deem safe could be an explanation.

This has a notion that high testosterone levels and high aggression are something normal and perhaps desirable.

I think the most probable explanation is that people are just evolving to be less aggressive naturally.


> Possible toxicity of something that we deem safe could be an explanation.

Plastics.


> Possible toxicity of something that we deem safe could be an explanation.

It's porn. Porn has proliferated right alongside this trend.


I doubt this is the only factor, but I imagine it contributes. I suspect it's more due to sedentary lifestyles and high-carb/sugar/fat diet.


> Possible toxicity of something that we deem safe could be an explanation.

Toxicity of media, liberal arts/Ivy league graduates going to have a career in education/media/HR constantly telling man and young boys how toxic masculinity is harming their fragile beings.

American culture has an wide extending impact. 5 years ago toxic masculinity was not even a term here. Now I hear it teachers in pre-school in my country of <10million population.


Isn't it just the more sedentary life, the safer environment?


Pesticides in our food?


Pesticides in our food are likely one of the reason as to why we see a "pandemic-like" increase in Alzheimer's disease among our old [1]. It is not too far-fetched to think this could affect our young in various ways as well.

[1] http://openvault.wgbh.org/catalog/V_474CF2C8A20B4173988486AC... (relevant portion min 40-45)


I was thinking about glyphosate as an endocrine disrupter.

Ie https://pubmed.ncbi.nlm.nih.gov/19539684/


then again that could be due to the reduction of environmental lead


Plastic


Aren’t Parabens and related plastics endocrine disrupters and weak estrogen mimics? Could be one plausible explanation


Yes, and microplastic has been found in pretty much all animals including humans now. It's a massive problem that will be incredibly difficult to clean up.


I believe Dupont's Teflon is also found everywhere in the water supply around the globe.


Probably a) changing culture. b) young men today don't have brain damage from lead exposure.


> Possible toxicity of something

This assumes (it seems to be universally assumed in this thread) that the earlier average level of testosterone - meaning the year 1999 - is more optimal, which doesn't seem evident to me.

Why not, equally: a toxin has possibly been removed?


Testosterone has well-studied correlations to muscular health and the tuning of status in social behavior. Going further, it also affects behavior in a way which I can only label as agentic: it's correlated with motivation, vigilance, and low levels of anxiety or fear.[0]

I choose these words for two reasons. First, the ratio of muscle to fat is important for most any metabolic disorder (this means both diabetes and obesity, which are comorbid). Muscles are actively important in metabolic health as they burn calories through use. And contrariwise, among their other problems, fat cells store and secrete estrogens, which is problematic for those that wish to identify as cis male. Clearly some level of the growth cascades that testosterone produces is useful for metabolic health, if not testosterone itself. Else we get into an obesity spiral and limit the development of our own bodies.

Second, high testosterone is often associated with anti-social outcomes like violence. While this is (weakly!) true, this isn't the whole truth. For instance, people given testosterone actually produced fairer deals vs non-blinded placebo.[0] So it seems more appropriate to call testosterone a status regulator than an aggression hormone.

Let's say we avoid the view that no testosterone is good – this would be ad absurdum considering its central role in the body's development. Even if you were to disagree as to basal level of testosterone in 1999, there are clear positive outcomes associated with testosterone which we can organize our sense of what is optimal around; it is possible that we have swung too far, and our current levels are not good enough.

To deny the positive aspects of testosterone, is to deny its usefulness to metabolic health, to regulating status, and maintaining the spiritedness to engage with life.

[0] https://www.lesswrong.com/posts/uRg5Q2vAteDem5b5S/social-sta...


>To deny the positive aspects of testosterone...

I think this comment illustrates a significant problem of people's (including some scientists) thinking around testosterone.

I'm identifying that people are only suggesting positive aspects of high testosterone and ignoring the negative. And, you are again reiterating the positive aspects in a biased, almost spiritualised way.

Clearly, as you suggest, 100% testosterone is absurd and not desirable, so there must be some limit to the amazing wonder-drug testosterone. Excessive testosterone is harmful to health apart from in behavioural changes (it's linked at least to heart failure).


What we're doing in this line of thought is negotiating that limit.

My remark was that no testosterone is absurd due to the critical role it has in development, providing a bound on what it would mean for testosterone to be a toxin. Some is good. I acknowledge that having high-enough testosterone levels to the point where heart failure and prostate cancer is implicated, would be difficult (although if true, the effect is non-linear: this study did not replicate issues with heart disease, nor did its citations[0]). So too much is bad. If you insist on framing testosterone as a toxin, then the dose will make the poison as well as the cure.

(100% testosterone is a nonsense quantity since you can always raise blood concentrations, but let's put it at values greater than 1000ng/dl for most people)

A universal drop in testosterone within at least the US, with something leftover to explain after controlling for lifestyle factors, and no sign of stalling in the trend, brings us to a conundrum. If we do nothing, and testosterone decreases faster than it used to, and some testosterone is good, and no testosterone is bad, but too much testosterone is bad, should we stop the process? Unless you set the "too much" to be much lower than what has been medically accepted, the answer must be yes at some point.

Since this is about picking an optima, what is at stake is whether or not testosterone levels before the 2000s were responsible for outsized rates of heart disease and prostate cancer (or other morbidities), and if this is true, whether or not the problems gained through the decline of testosterone weigh off the cost of its presence. We could include other externalities like status-seeking behaviors or sperm counts, which would make the comparison harder but more honest.

What I expect - I am not sure - is that testosterone's presence in heart disease (not prostate cancer) will be comorbid with testosterone-independent factors, such as diet/exercise. And since the norm seems to be testosterone declining with age I would be surprised if pushing that curve towards youth ends up being a good thing.

Feel free to challenge these assumptions, but I really think what we need to do is debate the weights.

> I'm identifying that people are only suggesting positive aspects of high testosterone and ignoring the negative. And, you are again reiterating the positive aspects in a biased, almost spiritualised way.

I am curious why you would use the word "spiritualized". I was not invoking the supernatural within my argument (the word "spiritedness" doesn't count; its meaning is secular). The emphasis on positive factors is because I'm debating your emphasis on the negatives. Attempting to frame the argument as spiritual without pointing to particulars is to add connotations of irrationality which aren't there. It is true that I am arguing emphatically.

[0] https://pubmed.ncbi.nlm.nih.gov/28740585/


> If you insist on framing testosterone as a toxin

I didn't intend my argument that way.

I was responding to the parent who was proposing that some environmental toxin had been introduced since the 1990s resulting in lower testosterone levels in men, seemingly from an underlying assumption that high testosterone is inherently good.

I was challenging that assumption directly. It seems at least equally plausible that some environmental toxin has been removed since the 1990s (to be specific, lead would be a good candidate) resulting in lower testosterone levels in men.


If you look at photos from the 90s and from the last couple of years people were very obviously much healthier in the 90s. Maybe it wasn't optimal, but without further evidence I'm going to believe it is closer to optimal than where we are now.


Back in the 90s we didn't all have phones in our pockets with high quality cameras. If someone got out a camera, it was a special occasion where people probably looked nice to begin with. On top of that, the pictures you see from the 90s are the pictures people have kept for 20 years - again creating a bias for situations where people looked nicer than they were day to day.

If you exclusively look at pictures from the 90s of people doing mundane things like shopping at a grocery store, they don't look any different from people today (except perhaps with worse fashion sense).


I grew up at a beach town. There really is no debate here. If you go back to the 80s it's even more extreme.


I too grew up in a beach town. It's selective memory.


Combined with an increase in obesity over the last several decades, is saying "it's just selective memory" as strong of a rebuttal?


The average american woman weighed 163.8 lbs in 1999, she weighed 171 in 2020. Average BMI increased from 28.2 to 29.1 in the same time period. Women on average added 2 inches to waist size.

Men went from an average weight of 189.4 to 197.9 in the same time period and BMI went from 27.8 to 29.1. Men on average added 1 inch on waist size.

A 5% increase in weight over 20 years might be concerning from a public health perspective, but it's not something you'd see just by looking at people.


From memory, there weren't as many obese people back in the 80's/ early 90's. Being really heavy was a thing that made a person stand out.

I think it's a lot more common now but that might just be selective memory.


The internet exposes us to astronomically more people than we ever could have seen in the 80s and 90s. Really heavy people are still rare today, but if you look at enough pictures of enough people, especially if these sites showing these pictures self-select for oddities, you're going to see quite a few, which makes them seem much more abundant today than they really are, plus much more rare in the past than they really were.

Again, look at pictures of groups in candid settings and you'll notice similar levels of obesity.


But we have statistical surveys which can assert this without having to look at photos.


Even if I agree, you're citing this as a measure of general/overall health, so testosterone levels are not specifically implicated.

High testosterone levels in men are linked to much higher heart problems, a major cause of early death.


If health has declined and testosterone levels have declined then absent any other information I am going to assume that the decline in testosterone is at best uncorrelated with health. Now, maybe there is a reason to assume that lower testosterone levels are actually healthier but I'm going to trust my eyes for the time being.


By almost any measure, global health has improved and global testosterone levels have declined.

Absent any other information, you should therefore assume...


At the same time you are hiding information by taking the global average as the proper baseline for comparison. This is disingenuous here because the original study picked a US cohort. The factors that are responsible for global health indicators improving might be, at least in principle, cancelled out in the US.


Seems like global warming and higher atmospheric CO2 levels correlates well with the timeframes.


Also a strong inverse correlation with pirates.


Been yachting in the Arabian Sea recently?


It was a reference to the Church of the Flying Spaghetti Monster.

https://en.wikipedia.org/wiki/Flying_Spaghetti_Monster#Pirat...

Note that the model does take the Arabian Sea into account.


I know! And I was referring to the flying spaghetti monster's original liturgy being inaccurate!

https://www.spaghettimonster.org/about/open-letter/


> getting into physical fight was much more common than today

I distinctly remember the popularity of gang culture in North American west coast cities. Everybody were forming gangs based on ethnicity usually (but racial diversity isn't uncommon). This was the era of gangster rap, Tupac, Biggie Smalls, Ice Cube, DMX, Bone Thugs, Nas....all the classics...the lyrics are simply HARD compared to today.


All the rappers were talking about slinging drugs. Today’a rappers are, or at least a huge chunk are, the people buying the drugs.


> When I was younger, in the late 90s, getting into physical fight was much more common than today

Testosterone is not simply and directly causing aggressiveness.

A lot of research shows that human behaviors are way more complex than that, and sometimes absolutely counterintuitive.

We are not baboons.


Recent studies has shown that exposure to flouride (which is found in toothpaste), is correlated with lower IQ scores. That might be a contributing factor.

[1] https://bmcpublichealth.biomedcentral.com/articles/10.1186/s...


"Due to the different study populations and areas, the conclusion that excessive fluoride causes loss of children’s IQ still lacks strong evidence."


That's just a reflection of demographics vs municipal water availability.


Yes, that is a possibility. There is also this fairly extensive meta-analysis over a period of 20 years, that finds a "consistent and strong association between the exposure to fluoride and low IQ". [1]

There is, in other words, an undeniable correlation. The more interesting question is -- are there any safe levels of exposure, and what are the effects over time?

[1] https://link.springer.com/article/10.1007/s12011-008-8204-x



[flagged]


Yes, and?


That means he didn't read it. Doesn't want to pop his bubble of choice.


Come on please think critically dude, here's an example of how terrible Snopes is. Please just think critically! https://www.snopes.com/fact-check/blm-terrorist-rosenberg/

https://i.imgur.com/SaDtCba.png

This is just one example of how they play fast and loose with facts. How can you trust this website?


hasn't this been known or at least suspected since the 90s/00s? I recall seeing similar studies from that period




Guidelines | FAQ | Lists | API | Security | Legal | Apply to YC | Contact

Search: