The Ordinary's Vitamin C Suspension 30% in Silicone brightens skin overnight. It utilizes a high concentration of pure L-Ascorbic acid to visibly brighten skin. This water-free formula remains stable and feels smooth due to the addition of light silicones. It works to reduce signs of aging, leaving skin smooth and even. Ideally applied at night, it allows the skin to improve its tolerance to a high concentration of vitamin C.