Palmitoyl dipeptide-7, as one of the cosmetic ingredients, belongs to the category of small molecule peptides. This ingredient can promote the synthesis of matrix proteins, collagen, elastin, hyaluronic acid, glycosaminoglycans and fibronectin in the skin, thereby improving skin elasticity, reducing fine lines, and playing an antioxidant and skin conditioning role. In addition, palmitoyl dipeptide-7 can also affect the expression of genes related to wound healing and skin recovery, enhancing the effects of other anti-aging ingredients.