L-carnitine, also known as carnitine, is an amino acid that can promote the conversion of fat into energy. L-carnitine is a kind of nutrient that has no toxic side effects on human body, so many friends will choose to buy slimming products containing L-carnitine. L-carnitine is a nutritional supplement that can convert fat into energy, and it is recognized by the International Obesity and Health Organization as the safest without side effects. The human body itself can synthesize L-carnitine, but with the increase of age, the ability to synthesize L-carnitine will gradually decline, so it is necessary to take L-carnitine slimming products to help lose weight. What are the functions of L-carnitine? L-carnitine can not only lose weight, but also improve endurance and anti-fatigue. Therefore, L-carnitine is an ingredient added to many kinds of health care products, so L-carnitine not only has the function of losing weight but also has the function of health care.