Comment by puredemo

>Someone's claiming that some particular aspect of modern diet causes obesity? It would have to either make you feel lethargic (lower calories out) or make you hungrier (raise calories in). Both of which are directly observable and easily correlated to the contents of recent meals, without having to argue over mechanisms and confounders and personalized gut bacteria and such.

This is extremely facile. Take trans fats scarring arteries and causing systemic inflammation, for instance.