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.