Originally Posted by
terrymorse
The reality appears to be a gradual weight gain, which implies a much smaller daily calorie overload.
Or some of the excess is being, er "dumped".
It's pretty clear that the energy used or fat stored per physical chemistry calorie entering the digestive tract is not universal across humanity, or even necessarily for the same person throughout their life.
There are all sort of potential explanations, ranging from our metabolism to our intestinal microbiome. And there's some evidence from kill it off and replace it illness treatments that changing out the microbiome can change weight gain (sometimes creating the problem).