Experiencing a period of starvation is a reasonably good indicator that you’re in a poor, unpredictable environment. In that case, storing a bit more fuel for next time is probably a good idea. Still, it’s impressive that their bodies “knew” what their normal weight was supposed to be and returned them to it, more or less, calling off the alarm when they’d hit their pre-study size. Clearly, the mechanisms that shape our metabolism and hunger are quite specific about the body weight and composition they work to defend.
