Carcinine is a natural peptide derivative. Carcinine dihydrochloride has been used to study its effects on dopaminergic neuron degeneration. It has antioxidant and anti-saccharification functions and has better stability because it is not recognized by enzymes in the body and loses activity. It can be used to remove skin yellow, lighten skin tone, fight against the invasion of external ultraviolet rays and pollutants and other adverse environment on the skin, prevent skin premature aging, maintain skin young state, can be added to beauty care products, such as emulsion, mask, morning, night cream, eye cream, eye serum, facial essence, muscle base liquid, toner, eye mask, gel and so on.