There is no question that a balanced diet is extremely important for skin health, but there’s more than one way to give your skin vitamins. There are also topical antioxidants, which are serums and creams that contain ingredients that nourish the skin, the most famous being vitamin C serum.  Topical antioxidants can help repair the skin from sun damage and oxidative stress.  The best time to apply them is right after cleansing so that your skin soaks them in, or they can be layered under your sunscreen for added protection.