The importance of food to the human body, now many people are very concerned about their own diet, diet should be reasonably distributed to ensure all kinds of nutrients needed by the human body and ensure the health of the body. Let's share the importance of food to the human body.
The importance of food to human body 1 1. Diet is the foundation of human life.
1, providing a lot of heat.
Healthy adults consume 2000 ~ 3000 kilocalories a day. More calories need to be consumed during the period of increased activity or growth and development. If nutrition is not supplemented in time, the body's resistance to diseases and growth and development will be affected. Food can provide a lot of heat to the human body. 4,000 calories per kloc-0/g protein; 9000 calories per 1 g fat; 4,000 calories per kloc-0/g sugar.
Step 2 provide immune substances
Lycium barbarum, chrysanthemum, milk, bee milk, soft-shelled turtle and other foods contain a lot of immune substances, which are especially important for the weak, infants and the elderly. Regular consumption can enhance human resistance.
3, provide a large number of antibacterial substances
Tea, garlic, onion and other foods contain a large number of antibacterial substances, which have obvious antibacterial effects on Gram-positive cocci and negative bacilli, and have obvious inhibitory and killing effects on Shigella, Escherichia coli, Staphylococcus aureus and Salmonella.
4, provide a large number of anticancer substances
Soymilk, soft-shelled turtle and other foods have anti-cancer effects, and regular consumption can prevent cancer.
5, provide a lot of vitamins, cellulose and trace elements.
Vitamins, cellulose and trace elements are all necessary for human body. Lack of vitamin B 1 will cause beriberi, lack of vitamin C will cause scurvy, lack of trace element selenium will cause cancer, and lack of zinc will cause growth retardation. Although the human body has little demand for these nutrients, it must be fully supplemented from the diet, otherwise it will lead to diseases.
6, provide a large number of enzymes and hormones
Iron obtained from animal viscera can enrich blood, and the obtained sex hormones are helpful to treat sexual dysfunction and other diseases; Animal testicles can be made into testicles for the treatment of sexual hypofunction, hypoplasia and climacteric disorders.
7. Regulate human metabolism.
Diet can balance the body's synthesis and catabolism. Tea has anticoagulant and fibrinolytic effects, and has obvious therapeutic effects on hyperlipidemia, atherosclerosis and hypervibrinemia, and has good therapeutic effects on coagulation and fibrin deposition in patients with gastritis. Mutton, dog meat, etc. It's good for the kidneys and has a lot of calories. Eating them can cure waist and knee pain and enhance resistance; Tremella fuciformis and Auricularia auricula can reduce blood concentration, which is beneficial to the prevention and treatment of coronary heart disease and arteriosclerosis.
8. Adjust the internal environment of human body to be relatively constant.
Gourd and wax gourd can benefit water; Celery and chrysanthemum can clear away heat; Honey and sweet potato can relieve constipation; Coriander (coriander), leek and ginger can sweat; Yam and poria cocos can strengthen the spleen and stomach, and these foods are conducive to maintaining a relatively constant internal environment of the human body.
It is found that more than 90% of human tumors are caused by external environmental factors, and diet is one of the important external environmental factors. Experts estimate that 30% ~ 35% of human cancers are attributed to improper diet. Dietary nutrients, varieties, cooking methods and food pollution are closely related to the occurrence of cancer.
Therefore, establishing good eating habits, eating more low-fat meals, eating proper amount of fruits or vegetables every day, and not eating particularly hard and hot food can avoid the stimulation and destruction of oral and esophageal mucosa and avoid cell canceration. In addition, chewing slowly can not only avoid the damage of digestive tract mucosa and chronic inflammation, but also increase saliva secretion.
Second, the diet is unreasonable and the overdraft is healthy.
Food hygiene is closely related to health. Diet can not only preserve health and cure diseases, but also harm the body and cause diseases. A scientific and reasonable diet can ensure the normal operation of life, and eating habits violate science and are tantamount to chronic overdraft health. Although many people know the importance of diet to health, they mistakenly think that eating nutritious food is enough. Practices under wrong views naturally affect health.
1, unreasonable diet accelerates human aging
There are many factors that affect human aging, including disease, nutrition, exercise, social pressure, mental mood, environmental climate and so on. But as the saying goes, an unreasonable diet will make the nutrition unbalanced, thus affecting the internal environment, destroying the biological metabolism process in the body and accelerating the aging of the body.
2. Unhealthy diet leads to diseases.
Common diseases and frequently-occurring diseases of the elderly often begin in their prime. After middle age, due to the gradual aging and degeneration of the body, the physiological functions of various tissues and organs are reduced, and the metabolic functions are reduced, especially the digestive function of the gastrointestinal tract is weakened. If the diet is unreasonable, it will affect the metabolism in the body and make the body's nutrition unbalanced. Overnutrition can lead to cardiovascular and cerebrovascular diseases and diabetes. Therefore, we should pay attention to reasonable diet and balanced nutrition in the young and middle-aged period.
3. Unreasonable diet increases the probability of cancer
Many cancers are closely related to environmental factors, and diet is the closest contact with the external environment, so food is closely related to cancer. A large number of experiments show that long-term unreasonable eating habits are the most direct factor leading to cancer. Gastric cancer, esophageal cancer and cervical cancer are all related to vitamin A deficiency. Esophageal cancer and gastric cancer are related to vitamin C deficiency. Esophageal cancer is related to long-term iron deficiency anemia; Thyroid cancer is related to iodine deficiency in food;
Liver cancer is related to vitamin B6 deficiency. Excessive drinking will not only lead to cirrhosis, but also lead to liver cancer, gastric cancer, colon cancer, rectal cancer and so on. If you drink too much, smoking will also increase the incidence of laryngeal cancer, oral cancer and lung cancer. Therefore, reasonable adjustment of dietary structure and balanced nutrition are of positive significance to cancer prevention and treatment.
The importance of food to human body. Diet provides a full range of nutrients to the human body, which can meet the needs of various physiological activities. Reasonable nutrition can promote the normal physiological activities of the body, improve the body's health, enhance the body's disease resistance and improve immunity. Reasonable nutrition can make the elderly energetic, improve work efficiency, resist aging and prolong life, which plays an extremely important role.
In order to maintain life and health, human beings must get all kinds of nutrients necessary for human body from food every day. In the past, many people often paid attention to the' harm' of malnutrition, thinking that insufficient nutrition would lead to weakness and affect human health; On the contrary, we don't know enough about the harm of overnutrition and unbalanced nutrition.
Balanced nutrition, reasonable diet, so that the brain is not short of "nutrients."
Protein is the most basic substance of mental activity, which can improve the excitability of the central nervous system and eliminate dizziness and forgetfulness caused by amino acid deficiency. Carbohydrate is the energy source of mental activity, which maintains the normal function of the brain. Lack of carbohydrate can cause dizziness, palpitation and cold sweat. Fat, especially unsaturated fat, is an important substance for strengthening the brain and improving intelligence, and it supplements the best fat.
Can stay away from depression, attention disorder, attention deficit and schizophrenia caused by fat deficiency; Minerals protect and stimulate the brain Iron is a useful supplement to intellectual development and helps to improve cognitive ability. Zinc is the active center of brain cell enzymes, which can enhance attention and memory.
Vitamins make the brain full of vitality, and some vitamins are of great significance to the development and functional operation of the brain; Cellulose and fruits, the energy of brain operation mainly depends on blood sugar, and maintaining blood sugar stability is inseparable from cellulose.
The importance of food to the human body is three meals a day. People eat not only to fill their stomachs or hunger, but also to ensure the normal development and health of their bodies. Experiments show that the protein digestion and absorption rate in food is 85% for three meals a day; If it is changed to two meals a day, and each meal eats half of the whole day's food, protein's digestion and absorption rate is only 75%. Therefore, according to the living habits of China people, generally speaking, three meals a day is reasonable.
At the same time, it should be noted that the interval between two meals should be appropriate. Too long an interval will cause a high degree of hunger and affect people's labor and work efficiency; If the interval is too short and the last food has not been emptied in the stomach, then eat the next food.
Will make the digestive organs can not get proper rest, affecting appetite. The residence time of mixed food in the stomach is about 4-5 hours, and the interval between meals is 4-5 hours. If it is 5-6 hours, it is acceptable.
Arrangement of three meals a day:
1, breakfast should pay attention not only to quantity, but also to quality. The staple food generally includes starchy foods, such as steamed bread, tofu, corn flour steamed bread and so on. And some foods rich in protein, such as milk, soybean milk, eggs, etc. , should be properly supplemented, so that the blood sugar in the body quickly rises to normal or exceeds the normal standard, so that people are refreshed and can work and study energetically. Lunch should be more appropriate and of high quality.
2. The staple food of Chinese food, such as rice, steamed bread, cornmeal cake and tofu, should be supplemented by foods rich in protein and fat, such as fish, meat, eggs, bean products and fresh vegetables, so as to keep the blood sugar in the body at a high level and ensure the work and study in the afternoon.
3, eat less dinner, in line with the principle of light and digestible, at least two hours before going to bed. If you eat too much dinner and eat a lot of food containing protein and fat, it is not easy to digest, and it will also affect your sleep.