Diet can provide a lot of calories to the human body. A healthy adult consumes 2000~3000 kilocalories a day. During the growth and development period or when the activity increases and gives off heat, the human body takes in more calories. If nutrition is not supplemented in time, it will affect the growth and development of the body and its resistance to diseases. 4 kilocalories per kloc-0/g protein; 9 kcal 1 g fat; It generates 4 kilocalories per 1 g sugar. According to the above data, we can make recipes and arrange nutrition reasonably.
Diet can provide a lot of vitamins, cellulose and trace elements necessary for human body. Lack of vitamin B 1 can cause beriberi, lack of vitamin C can cause scurvy, lack of trace element selenium can cause cancer, and lack of trace element zinc can cause growth retardation. The human body doesn't need these nutrients very much, but it must be fully supplemented from the diet, otherwise it will lead to diseases.
Diet can provide immune substances. Milk, bee milk, soft-shelled turtle, medlar, chrysanthemum and other foods contain a lot of immune substances, which can enhance the body's resistance if eaten regularly, especially suitable for infants, the elderly and the weak.
Diet can provide many antibacterial substances. Garlic, onion, tea and other foods contain a large number of antibacterial substances, which have obvious antibacterial effects on Gram-positive cocci and Gram-negative bacilli, and have obvious inhibitory and killing effects on Salmonella, Shigella, Escherichia coli and Staphylococcus aureus.
Diet can provide many anticancer substances. Skin soft-shelled turtle, soft-shelled turtle, soybean milk and other foods have anti-cancer effects, and can prevent cancer if eaten regularly.
Diet can regulate the body's material metabolism and balance the body's synthesis and catabolism. Mutton, dog meat, poultry, etc. It's good for the kidneys and has a lot of calories. Eating them can cure the waist and knees and increase resistance; Tremella fuciformis and Auricularia auricula can reduce blood concentration, which is beneficial to the prevention and treatment of coronary heart disease and arteriosclerosis; Tea has anticoagulant and fibrinolytic effects, which not only has obvious therapeutic effects on atherosclerosis, hyperlipidemia and hyperfibrinemia, but also has good therapeutic effects on coagulation and fibrin deposition in patients with gastritis.
Diet can regulate the relative stability of human internal environment. Such as coriander (coriander), leek and ginger can sweat; Celery and chrysanthemum can clear away heat; Wax gourd and gourd can benefit water; Honey and sweet potato can relieve constipation; 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.
Diet can provide a lot of hormones and enzymes. Testicular tablets made from animal testicles can treat symptoms such as hypoplasia, sexual dysfunction and climacteric disorder. Iron obtained from animal viscera can enrich blood, and the obtained sex hormones are helpful to treat sexual dysfunction and other diseases.