It's high glycemic index carbohydrates, full stop. They do not satiate hunger, they result in more hunger, they are intrinsically addictive (see https://www.ncb

It's high glycemic index carbohydrates, full stop. They do not satiate hunger, they result in more hunger, they are intrinsically addictive (see https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1931610/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1931610/ for example; animal studies conveniently dodge "human willpower" accusations and demonstrate this nicely), and at the end of the day they result in the average person using their average motivations (i.e. not strenuously avoiding calories) to steadily gain weight. Watch the entire 3-part series on youtube, "Nature Wants Us To Be Fat"; Dr. Richard Johnson seems to know his stuff, he's accredited, and he cites plenty of research: https://www.youtube.com/watch?v=gAjC_BWMElk https://www.youtube.com/watch?v=gAjC_BWMElk It's a little dry but fascinating- this seems to be the intellectual crowd that might be receptive to "dry but fascinating"