L-carnitine is a dietary supplement, and its main physiological function is to promote the conversion of fat into energy. Taking L-carnitine can reduce fat and weight without reducing water and muscle. In 2003, it was recognized as the safest nutritional supplement with no side effects by the International Organization for Obesity and Health.

L-carnitine is a key substance in the process of fat metabolism, which can promote the oxidative decomposition of fatty acids into mitochondria. If fat does not enter mitochondria, no matter how you exercise or diet, you can't consume it. In long-term intensive exercise, carnitine increases the oxidation rate of fat, reduces the consumption of glycogen and delays fatigue.

L-carnitine has no side effects. However, unscrupulous merchants will add illegal drugs such as sibutramine in order to make users feel very effective. So to be on the safe side, it's best to buy international brands.