Vitamin E is a group of fat-soluble vitamins. It is an important substance to maintain and support the immune system. It is an effective antioxidant and can prevent free radicals from destroying cells. Due to its antioxidant properties, vitamin E has traditionally been regarded as a good way to prevent cardiovascular diseases. Although eating foods rich in vitamin E can help minimize the risk of heart disease, you should consult a doctor before supplementing vitamin E. Vitamin E is a fat-soluble vitamin, which means that excessive intake may cause poisoning, resulting in muscle and nerve damage.