Metabolic Enhancers are sometimes refered to as slimming pills or weight loss pills. The main ingredient of most metabolic enhancers is ephedra. Ephedra is a legal stimulant similar to amphetamine (speed). A small dose of ephedra is like a couple of cups of strong coffee.
Metabolic Enhancers do temporarily speed up your metabolic rate but they can leave you feeling jittery, nervous and speedy, raising the blood pressure and heart rate.
Metabolic Enhancers also sometimes contain carnitine and chromium both of which have an important influence on different parts of the metabolic function (blood sugar in the case of chromium, and fat metabolism in the case of carnitine). However the dose contained is usually very limited.