Palmitoyl tripeptide-5 promotes skin cell growth, inhibits oxygen and hydroxyl radicals, promotes matrixprotein (matrixprotein) synthesis, especially collagen, and may also increase the production of elastin, hyaluronic acid, glycosaminoglycan and fibronectin. This collagen peptide promotes collagen synthesis by increasing stromal cell activity, making the skin look more elastic and youthful. The way of action is like retinoic acid, but without the side effects of retinoic acid, increasing the synthesis of collagen and hyaluronic acid (HA) in the intercellular substance, making fine lines invisible and skin firm