The extent to which mainstream health advice is contradictory to health is hard to grasp when you look at it in its entirety

Fat Acceptance and health at any size
Meat is bad
Eggs are bad
Artificial oils are good
the Sun gives you cancer
Too much protein hurts your kidneys

— Alexander J.A Cortes (@AJA_Cortes) April 25, 2020

Indeed. A very good heuristic is just to do exactly the opposite of what Fat Acceptance advocates say. This won’t get you everything, but it’s just so quick, easy and correct that it’ll work better than 90% of fitness and diet plans out there.