Onion has been viewed as a spice and as a vegetable is rich in potassium, selenium and vitamin C. Ingredients selenium is found in onions are good for skin, nails and hair. In addition, the quality of vegetables quexetin this effect is very strong antioxidant, combined with selenium to help free radicals, cause wrinkles and skin induration. In the nutritional components of nonfat onion, likely reducing peripheral resistance, resistance to the effects of increased blood pressure, maintain the stability of the process in the body excrete salt. Therefore, the effect of onion decreased blood pressure more effectively and safe antihypertensive drugs. Also, peel the onion also contain rutin, very beneficial for employment and blood vessel walls, preventive brain hemorrhage stroke.