Because we understand that a targeted combination of antioxidants is more powerful than a single antioxidant alone, we formulated this highly concentrated serum with 100% active ingredients * each with a skin-specific purpose in mind. This super-antioxidant blend of vitamins A, C, D, E and K and essential fatty acids helps the skin push back against free radicals that cause aging. Squalane, one of the most dynamic ingredients in skincare formulas, deeply hydrates and creates the path for delivering these nutrients into the skin. Once there, VitaRich Serum tells the skin to behave younger, healthier and to do what it was intended to do naturally: strengthen itself. It can be used as a standalone moisturizer or as a booster underneath a cream for extra dry skin.