Haven't you heard of onions to lose weight? In fact, onions can not only lose weight, but also detoxify. Accurately speaking, it is to achieve the purpose of losing weight through detoxification. So today, let's see what's the mystery. Selenium is a mineral with strong antioxidant capacity, which is mainly excreted after combining with mercury. Sulfide: the odor component of onion, which can make the detoxification enzyme of liver fully play its role. Glutathione: Liver fat metabolism is one of the peptides containing sulfur-containing amino acids, which has antioxidant effect, can improve liver function and promote fat metabolism.