Ionizing radiation is by can cause material ionization of charged particles, uncharged particles or electromagnetic radiation constitute radiation. Radiation has been all over the field: the subway and other transportation channels of X-ray security; agricultural irradiation cultivation of new varieties of vegetables and fruits, insurance, food storage; medical X-ray fluoroscopy, photographic diagnosis, radionuclide determination of the human organ, irradiation treatment of tumors, etc.; electronic microscopes, electronic speed welders, color TV tubes, high-voltage tubes, and so on. These radiation more than a certain dose of action in the body, the body can cause a variety of nutrients metabolic disorders, such as energy, protein and fat metabolism. The body can also cause a series of pathophysiological changes, while nutrient metabolism disorders can also make radiation sickness worse. If you give a reasonable nutritional diet, you can reduce radiation damage. Nutritional principles 1, the role of protein on radiation damage: protein is the basic substance of life organism, when the body is damaged by radiation, protein molecular decomposition, fracture, metabolism is significantly impaired, the body protein synthesis is also damaged. Therefore, increase the supply of protein, especially to supplement the high utilization rate of high-quality protein, can reduce radiation damage and promote recovery. Skimmed soybeans have the best effect on protection against damage. 2, the role of fat on radiation damage: the proportion of dietary fat should not be too high, while the essential fatty acids should be increased appropriately, the radiation damage protection is favorable. Oleic acid, olive oil and peanut oil have the effect of protection against radiation damage, and unsaturated fatty acids have a certain preventive effect on radiation. However, it is not the more fat the better, high-fat diet on radiation damage on the contrary, can occur liver dysfunction, and make the prevalence of atherosclerosis increased; due to radiation can be caused by elevated blood lipids, so it is not appropriate to increase the percentage of fat in the total energy, so the dietary fat should be moderate. 3, sugar on radiation damage: radiation damage, due to glycogen production and storage function are damaged, and insulin activity decreased, so should supplement glucose and insulin. All kinds of sugar on radiation damage nutritional effect may be due to its consumption and absorption or utilization of differences and different, glucose than sucrose, starch, dextrin protection effect is good, and fructose protection effect is better, can make the radiation damage liver toxicity reduction; fructose and folic acid and vitamin B12 combined, can make the irradiated organism of the increase in erythrocytes. 4, vitamins on radiation protection: irradiation of the body tissue and plasma vitamin C content is reduced, so exposure to radiation operations should be appropriate amount of supplemental vitamin C, radiation therapy patients can also take vitamin C, in order to resist the harm of radioactive damage to the body. (1) Vitamin PP can reduce capillary permeability and fragility. It can strengthen the effect of vitamin C and promote the accumulation of vitamin in the body. Vitamin PP is a hydrogen transporter, involved in redox in the body, the cardiovascular system has a good effect, but also to prevent the development of leukopenia, so it is necessary to consume more citrulline, orange peel glycosides, rutin, etc. containing vitamin PP active substances to resist the role of radiation. The organism is often deficient in vitamin B1 after radiation exposure. (2) Vitamin B12 is a hematopoietic factor that can increase the utilization of folic acid and promote nucleic acid and protein biosynthesis. Most of the data proved that there is no significant change in the content of vitamin B12 in the serum after radiation therapy, and vitamin B12 deficiency has not been seen in chronic radiation sickness. For patients with complications of radiation therapy, injection of vitamin B12 before and after irradiation or during the course of treatment did not show a good effect. Although vitamin B12 does not have a corresponding protective effect against radiation damage, vitamin B12 is an anti-anemia factor, so it should still be used appropriately during irradiation. (3) Folic acid has an important role in the synthesis of purine and pyrimidine, so radiation damage treatment, should be given appropriate amount of folic acid. (5) Inorganic salts play a role in radiation injury: the systemic effect of ionizing radiation can affect the metabolism of inorganic salts, so it is necessary to supplement the appropriate amount of inorganic salts. Appropriate food 1, the choice of staple foods and legumes can be a variety of staple foods, appropriate intake of coarse grains, soybeans and soy products. 2, the choice of meat, eggs and milk can choose more eggs, dairy and dairy products, pork liver, lean meat, fish and so on. 3, the choice of vegetables cabbage, carrots, potatoes, tomatoes, kelp, seaweed, mushrooms and so on. 4, the choice of fruit citrus, kiwi, cherries, apples and other fresh fruit. 5, other honey, tea, almonds, yeast, silver ear, etc.. Dietary taboos avoid barbecue fried products and fatty meat. One-day reference meals Breakfast: round-grained rice, soybeans, corn, wolfberries, honey, eggs, cabbage, etc., such as mixed grain porridge, hard-boiled eggs, vegetarian stir-fried cabbage; Extra meal: apples; Lunch: rice, brown rice, pig liver, carrots, bell peppers, cabbage, etc., such as two-meter rice, red and green pig’s liver, stir-fried cabbage, clams and seaweed soup; Extra meal: yogurt, whole-wheat bread; Dinner: cornmeal, shrimp skin, seaweed, eggs, shiitake mushrooms, lean pork, such as cornmeal rice cake, purple cabbage and egg soup, shiitake mushrooms fried lean pork; a cup of hot milk before bed.