Palmitoyl tripeptide-5 promotes skin cell growth, inhibits oxygen and hydroxyl radicals to promote matrix protein (matrix protein), especially collagen, and may also increase the production of elastin, hyaluronic acid, glycosaminoglycans and fibronectin. This collagen peptide promotes collagen synthesis by increasing stromal cell activity, resulting in skin looking more elastic and youthful. The mode of action is retinoid-like, but without the side effects of tretinoin, it increases the synthesis of hyaluronic acid (HA) in collagen and intercellular stromium, so that fine lines are not visible and the skin is firm.