Our most sophisticated serum yet: a high-performance vitamin C facial serum that’s clinically proven to improve wrinkles, pigmentation and firmness. Doctor developed for superior stability and potency, this daily defense serum helps to brighten and restore skin while providing advanced environmental protection. With 20% tetrahexyldecyl ascorbate, an ultra-concentrated, lipid-soluble form of vitamin C, it helps to fade the appearance of pigmentation and improves signs of skin aging like fine lines, wrinkles and loss of firmness. A synthesis of super-antioxidants ferulic acid and acetyl zingerone help to enhance the effects of vitamin C. An optimized hyaluronic acid complex brings renewed hydration to the skin, supporting a plump, smooth and firm appearance.