First of all, reasonable nutrition is the guarantee of life movement. In order to achieve reasonable nutrition and ensure health, it is necessary to distribute diet reasonably to meet the requirements of various nutrients. According to the heat energy distribution of three meals a day, it is reasonable to take 25% ~ 30% for breakfast, 35% ~ 45% for lunch and 30% ~ 35% for dinner, but it can also be modified according to the life and schedule of various places. Each country puts forward the recommended dietary supply for people of different ages and sexes according to its own situation, living habits, food production and supply. Food is the most important thing for people, and nutrition is the basic substance to maintain life in the whole life process. However, in the process of nutritional supplement, balanced nutrition is needed to make the body healthy. Therefore, it is the guarantee of health to supplement nutrition reasonably and scientifically and treat diseases and prevent diseases. Experts pointed out that in order to maintain normal physiological functions and meet the needs of normal growth and development, metabolism and work, human beings must consume necessary and reasonable nutrients from food every day.
Secondly, reasonable nutrition is the material basis of health. So far, scientists have found that the human body needs 42 kinds of nutrients, and the number of nutrients needed by the human body must maintain a certain proportion. Less is not enough, more is not enough. When various nutrients play a role in the human body, they depend on each other, influence each other and restrict each other. For example, the human body needs more calcium, and the digestion and absorption of calcium must be completed together with vitamin D, which is a fat-soluble vitamin. If the intestine lacks fat, it can't be well absorbed by the intestine. Only by eating vitamin D and eating a certain amount of fat can vitamin D be absorbed.
Finally, reasonable nutrition promotes health. First, promote development and improve intelligence; Development refers to the improvement of the functions of various systems, organs and tissues. The main factors affecting growth and development are nutrition, exercise, social environment and genetic factors, among which nutrition plays an important role. The main component of human cells is protein. The formation, reproduction and enlargement of new cells and tissues are inseparable from protein, so protein is an important substance necessary for the development of children and adolescents. Nutritional status has great influence on people's intelligence. Infants and children are the fastest growing period of the brain, and they need adequate nutrition, such as docosahexaenoic acid, lecithin and protein. Especially docosahexaenoic acid, if intake is insufficient, it will affect the development of intelligence. Second, advocate eugenics and prevent diseases; There are genetic factors that affect eugenics, but nutrition is also an important factor that cannot be ignored. At the beginning of pregnancy, pregnant women should pay attention to the influence of congenital nutrition on the baby's physique and intelligence. In some parts of the world, the lack of nutrition in pregnant women's diet leads to fetal malformation, abortion and premature delivery. If pregnant women lack folic acid in their diet, it will cause fetal neural tube defects (such as spina bifida and anencephaly); Lack of vitamin B 12 will lead to water brain phenomenon. Therefore, reasonable nutrition can promote health, while undernutrition or overnutrition may lead to diseases. Diseases caused by malnutrition are malnutrition diseases, such as iron deficiency anemia, rickets, night blindness, goiter and so on. Diseases caused by overnutrition are called "rich diseases" or "civilized diseases", such as diabetes and cardiovascular diseases. Undernutrition and overnutrition are related to improper nutrition intake on the one hand, and lack of nutrition knowledge on the other. Popularizing nutrition knowledge and reasonable intake of nutrition are of great significance to the prevention and treatment of diseases. Third, enhance immune function and promote health and longevity; Immunity is a protective response of the body. If the immune ability is low, it will be vulnerable to all kinds of germs, and the phagocytic cells of malnutrition patients will reduce their ability to cope with bacterial attacks. Some nutrients in food, such as vitamin E, vitamin A, vitamin C, trace elements such as zinc and selenium, glutathione and flavonoids, all have the function of improving immunity. The aging of human body is an inevitable process in nature. Although there is no secret recipe for immortality, if you pay attention to balanced intake of nutrition, you can completely delay aging and achieve the goal of health and longevity.
Therefore, the correct way should be to eat with balanced nutrition and limited quantity. Only by paying attention to the quantitative and balanced diet, proper exercise and exercise, insisting on regular weight measurement and maintaining a peaceful mind can we have health and a high-quality life. The nutritional needs of patients with different diseases are particularly important, so it is necessary to arrange meals reasonably under the guidance of nutritionists. The nutrients contained in the diet are complete in variety, sufficient in quantity and appropriate in proportion; The nutrition provided in the diet is in balance with the needs of the body. According to China's national conditions, nutritionists formulated the Dietary Guide for China Residents, which vividly expressed the proportion of various foods. The bottom of the dietary pagoda is cereal, and each person should eat 300-500 grams a day; The second floor at the bottom is the consumption of vegetables and fruits, and each person eats 400-500 grams a day; The third layer is animal food such as fish, poultry, meat and eggs, which should be eaten 125-200 grams every day (including 50 grams of fish and shrimp, 50- 100 grams of livestock and poultry meat and 25-50 grams of eggs); The fourth layer is milk and bean products. You should eat 100g milk and 50g beans or bean products every day. The top spire is grease, which does not exceed 25 grams per day.