I think there could be even more components. For example eating some foods actually makes me way more hungry than I was before. Take yogurt or (stevia) sweetened, flavored whey protein powder. I'm ok, then I eat some, then I'm ravenous. I'm literally way hungrier after eating those foods than before. Cheese has it, too. Most carbs as well, especially sweet ones I think it might be something about insulin being released from dairy and from sweet taste. Even if it's zero-caloric sweetener like stevia or monk fruit, I feel a spike in appetite 15-30 minutes later.