Formulated with a powerful blend of 20% pure Vitamin C, plus Ferulic Acid and Vitamin E, this serum helps to revive aging skin and impart a radiant glow. Soften sun/aging spots and achieve a brighter, youthful complexion. Texture, tone, and hyperpigmentation are improved for a glass skin look. A patch test is recommended as this serum contains highly concentrated pure Vitamin C. Be sure to store it in the refrigerator to prevent oxidation.