The results? If you give a human a cookie—or cheeseburger or royal blue yogurt or mashed potatoes injected with butter and cream and topped with thick salty gravy—we will eat more and more of those foods until we fatten up and die of heart disease. If you give a human plain yogurt with some berries—or plain potatoes, lean meat, or rice—we will eat just enough of those foods. We’ll be less likely to fall into a scarcity loop of food.
