"In food, vitamin E is found in vegetable oils, nuts, and seeds. Its main role in the body is to act as a fat-soluble antioxidant, and aid in immune function and heart health as well. But like vitamin C, topical application will get you the best results with this ingredient. Especially when it comes to sun protection. Your skin’s gonna love this: As an antioxidant, vitamin E is vitamin C’s counterpart to skin health. It protects the fatty cellular parts of your body (such as the cell membranes) from the reactive free radicals, the culprits for oxidative damage and effects of aging (often caused by UV exposure). For most people, vitamin E doesn’t tend to cause any allergic or irritant reactions. In skin care, vitamin E is usually listed as tocopherol or tocopheryl acetate. It’s frequently used in sun protection and anti-aging products at concentrations of 0.5–1 percent, due to its antioxidant effects. Brands often combine it with vitamin C or vitamin A (retinoids) to boost their action.