Vitamin E exists naturally in certain foods, including seeds, nuts, some vegetables, and some fortified products. You can also take it as a dietary supplement. It plays many roles in your body. It’s perhaps best known for its antioxidant effects, protecting your cells from oxidative damage by neutralizing harmful molecules called free radicals. In addition, it’s needed for proper immune function and cellular signaling. That’s why it’s not surprising that research suggests taking vitamin E supplements may benefit your health in several ways.