Metabolism is how your body changes food into energy. How you lose weight matters. If you don't eat enough, your metabolism switches to slow-mo. Severe diets, especially when you also exercise, teach your body to make do with fewer calories. That can backfire, because your body clings to those calories, which makes it harder to take weight off.
We recommend certain supplements to speed up your metabolism, which may be sluggish due to a variety of health issues below.