Supercharge your glow with a high-performance vitamin C. This powerful daily antioxidant serum is made with 15% pure L-ascorbic, the industry's gold standard of vitamin C to help defend all day from free radicals and works to brighten skin tone and reduce signs of past skin damage. Key Ingredients: Known as the purest form of Vitamin C, L-ascorbic Acid helps neutralize free radicals, minimize the look of fine lines and wrinkles, and brighten skin tone. | Obagi Medical Professional-C Serum 15%, 0. 42 oz | Dermstore