I recommend reading this book, which helps to deconstruct many misconceptions about food. The examples serve to illustrate the words of G. Taubes are edifying (particularly through the study of the introduction of foods high in carbohydrates, in the reserve of Pima Indians in the United States when it was no longer permitted them to feed from their natural environment, caused by their sedentary).
It also evokes a rare disease called "progressive lypodystrophie" which is characterized by excessive localized fat ... only below the waist. Can we ultimately always think that people do not lose weight because they do not have enough willpower? !!!