Vitamin E boosts your immune system and improves your cardiovascular health, as well as contributing to overall health. It is also recommended for Alzheimer's patients, as it can slow down the progression of the disease, thanks to its ability to reduce cell damage from free radicals. Vitamin E can prevent macular dysfunction, eye diseases that causes vision loss. It is an antioxidant, protecting body tissue from damage caused by substances called free radicals. Free radicals can damage cells, tissues, and organs.