How does it work then? As I understand it depriving body of calories causes it to be more efficient with the calories it gets. What I’m missing? Maybe what you are still missing is that this effect will change depending on amount of calories we’re talking about? I doubt there are studies measuring the effect of 100 calories deficit because it would be negligible. Of course if we get into real diet/moderate exercise the effects will change. Is this why you think the effect is different overall?