Hexapeptide-9 is composed of six amino acids and is a highly stable collagen peptide. The structure of this peptide is found in human collagen type IV and type XVII (two key basement membrane collagens). Hexapeptide-9 can promote the synthesis of type I and IV collagen, laminin-5 and integrin, showing significant anti-wrinkle and repair functions. Therefore, it is widely used in the cosmetics field to promote collagen synthesis, accelerate the differentiation and maturation of epidermal cells, and reduce the formation of wrinkles, thereby enhancing the firmness and elasticity of the skin.