> "If this is true, why don't we become incredibly fat or skinny over time?" I mean, we do. One of the big tricks here is that your basal metabolic rate is not

> "If this is true, why don't we become incredibly fat or skinny over time?" I mean, we do. One of the big tricks here is that your basal metabolic rate is not a constant. As your weight increases you burn more energy than before simply existing. If you're running a very slight caloric surplus this will be neutralized as your weight increases, thus stabilizing you.