Everybody is sodium sensitive, it’s a basic fact that your body retains additional fluids if you increase your sodium intake, just talk to some bodybuilders. Chronic long term exposure to a high sodium diet is a risk factor for all sorts of issues because of this basic fact of biology. Way more so than MSG or even artificial sweeteners. But people focus on the wrong thing.

My understanding is that most people's blood pressure does not increase in response to dietary sodium, which is the sensitivity described in this context.

And half of the half that are sensitive, it lowers blood pressure.