CeraVe Skin Renewing Vitamin C Serum features 10% pure vitamin C (L-ascorbic acid) for antioxidant benefits, while also helping to visibly brighten your complexion. even skin tone, and boost collagen. This gentle vitamin C serum is formulated with ceramides, moisturizing hyaluronic acid, and soothing vitamin B5 to help improve texture, plump fine lines, and enhance hydration for soft, radiant, healthy-looking skin. Cera Ve vitamin C serum comes in protective packaging that helps prevent oxidation and extend shelf life, however, once itis opened it should be used in 6 weeks. This is one of the most affordable Vitamin C serums that really works.