He sites several studies including the Minnesota Starvation Experiment[0]. It's pretty simple, if the body gets some calories but not enough, your metabolism is

He sites several studies including the Minnesota Starvation Experiment[0]. It's pretty simple, if the body gets some calories but not enough, your metabolism is lowered and you have less energy along with a host of other symptoms. This also explains why this is a terrible dieting strategy, once your metabolism is lowered you regain the weight quite fast once you start eating more. [0]https://en.wikipedia.org/wiki/Minnesota_Starvation_Experiment https://en.wikipedia.org/wiki/Minnesota_Starvation_Experimen...