Supercharge your glow with our Professional-C Serum 10%, made from the industry's gold standard of vitamin C. This powerful daily antioxidant serum made with 10% L-Ascorbic Acid is effective in defending the appearance of fine lines, wrinkles and photoaging of the skin, while also working to neutralize free radicals and environmental stressors. 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 10%, 0. 42 oz | Dermstore