Zero fat diets work just as well. People lose weight if you force them to get most of their calories from sugar syrup, or potatoes, or bananas. The mechanism is

Zero fat diets work just as well. People lose weight if you force them to get most of their calories from sugar syrup, or potatoes, or bananas. The mechanism is the same: food reward, as explained in the whole health source link. People stop overeating because monotonous food is less rewarding. There's no magical obesogenic property of "carbs."