BENEV Vitamin C Serum uses the stable water soluble form of Vitamin C (L-Ascorbic acid) that is able to penetrate the outer layers of the skin. Vitamin C is a strong antioxidant and is one of the protective substances that is involved in the capturing or neutralizing of free radicals formed upon exposure to UV radiation. Once penetration occurs in the epidermis (outer layer of the skin), Vitamin C Serum reduces melanin to a colorless substance, inhibiting the formation of freckles, excessive darkening of the skin, and age spots. Vitamin C Serum has a pronounced toning and firming effect on the skin, making it ideal as an ingredient in cosmetics intended for use around the eyes (reduction of puffiness, etc.) as well as skin care products for aging and mature skin.