This is a recent problem. Do we think those purported fat genes just evolved in society over the past eightyish years, and spread so widely that, per the 2017-2018 NHANES data, 73% of American adults are overweight (30.7%) or obese (42.4%)? On a population level it’s clear this cannot be genetic. There’s been a cultural shift that has caused this problem, often thought to be related to processed food, less time to cook, and for some underserved communities, food deserts.
Look at how dramatically obesity has risen since the '80s:
kcweller@feddit.nl 1 day ago
Read the sources here and you see that monogenetic, epigenetic and polygenetic obesity is only partly of influence on actually becoming obese, and that with a proper healthy environment (which not everyone has access too, I understand) obesity doesn’t need to develop.
obesitymedicine.org/blog/obesity-and-genetics/
Meanwhile, where are the sources supporting the initial statement?