Our Vitamin C anti-aging serum contains retinol, hydrogenated Jojoba oil. It can enhance the resistance of epidermal cells and prevent various skin problems. Its use is very simple: 1/ Use after cleansing. 2/ Apply appropriate amount to face. 3/ From the fine lines on the face/neck/eyes, massage into the entire face in a circular motion. 4/ Can be fully absorbed. And can renew the skin cuticle, with ascorbic acid glucoside, to help improve skin gloss and permeability.