What it is: A high-potency antioxidant serum with 25 percent pure vitamin C and a five-antioxidant blend to visibly enhance skin clarity, radiance, and texture. Skin Type: Normal, Dry, Combination, and Oily Formulation: Serum What Else You Need to Know: This is a high-potency antioxidant serum that is formulated with 25 percent pure vitamin C and a five-antioxidant blend to visibly enhance skin clarity, radiance, and texture.