L-carnitine is an essential element for human body, so it has no toxic and side effects on human body. People can take L-carnitine in their daily diet, which can reduce fat and weight. Therefore, L-carnitine has also been designated as the safest nutrition for weight loss, with no side effects. People produce L-carnitine every day, but some friends will take L-carnitine from the outside for a long time in order to lose weight, which will affect their ability to synthesize L-carnitine, so the dosage of L-carnitine must be strictly controlled every day. So when is it better to eat L-carnitine? The purpose of many friends taking L-carnitine is to lose weight. Therefore, it is recommended to take it one hour before exercise. And after taking it for one month, it needs to be interrupted for one week to avoid harm to the body after taking it for a long time.