Corn is rich in unsaturated fatty acids, especially linoleic acid, the content of which is as high as more than 60%. It can reduce blood cholesterol concentration and prevent it from depositing on blood vessel wall in synergy with vitamin E in corn germ. Therefore, corn has certain preventive and therapeutic effects on coronary heart disease, atherosclerosis, hyperlipidemia and hypertension. Vitamin E can also promote cell division and delay aging. Corn also contains a longevity factor-glutathione, which, with the participation of selenium, generates glutathione oxidase, which has the functions of restoring youth and delaying aging. Selenium and magnesium contained in corn have anti-cancer and anti-cancer effects. Selenium can accelerate the decomposition of peroxides in the body, so that malignant tumors are inhibited without the supply of molecular oxygen. Magnesium can inhibit cancer cells on the one hand