Age Defense Antioxidant Serum C contains the finest USP pharmaceutical grade L-ascorbic Acid (Vitamin C) antioxidant essential for skin cell growth and collagen production. The skin relies on antioxidants for protection against free radicals. By preventing damage created by UV generated free radicals, Age Defense Antioxidant Serum C works synergistically with our Facial Moisturizer SPF 35, which neutralizes UV rays, and other glycolic and retinol products. Designed for all skin types, Antioxidant Serum C prevents premature signs of aging, lightens and brightens skin tone and helps accelerate the healing of skin. Formulated with 20% L-ascorbic acid, other powerful antioxidants, and utilizing advanced pH Science to enhance penetration and effectiveness.