Natural vitamin E is a fat-soluble antioxidant found in various foods such as nuts, seeds, and leafy greens. In the USA, it is commonly studied for its role in supporting cellular function and protecting cells from oxidative stress. Unlike synthetic forms, natural vitamin E is typically listed as d-alpha-tocopherol and may offer better absorption. It plays a key role in immune health and skin maintenance. Researchers also explore its impact on cardiovascular and eye health. In dietary supplements, natural vitamin E is often derived from plant oils. Accurate labeling is essential to distinguish it from synthetic variants in the U.S. market.