Our TCA 40% Skin Peel Serum contains Malic Acid, Citric Acid, Ascorbic Acid. It can effectively slow the aging process of skin, reduce fine lines and wrinkles, improve skin elasticity, and make skin look younger and firmer. The way to use it is simple: clean and dry the skin, use an eyedropper to take the appropriate amount of essence on your hand, apply the product to the skin, and gently massage until absorbed. It can shrink pores, adjust the balance of water and oil in the skin, improve the problem of coarse pores, and make the skin more delicate and smooth.