As compelling as the theory that "unhealthy behavior" is root cause of the obesity epidemics, at this point it seems to me that the weight of evidence suggests an actual physical disruption. It's not supposed to be _this hard_ for (some) people to maintain their weight; something is actually not working right.

https://slatestarcodex.com/2017/04/25/book-review-the-hungry... might be interesting in the same direction.