What foods can enhance human immunity

　　Nutrients that play an important role in immunonutrition include macronutrients (such as protein and dietary fiber, etc.), micronutrients (such as zinc, copper, iron, magnesium, selenium, manganese, vitamins A, C, E, B6, folic acid, etc.) and special nutrients (ω3 fatty acids, glutamine, arginine, RNA nucleotide, tomato red pigment, fructooligosaccharides and β-carotene, etc.). First of all, the three major active substances in the body (enzymes, hormones and nerve Transmitters) are all related to proteins. Some immune components, such as immunoglobulins and complement, are themselves proteins. Therefore, the role of proteins in immunity is self-evident. Secondly, dietary fiber can form short-chain fatty acids under the action of bacteria in the lower intestine. This fatty acid can be used as an energy source for intestinal mucosal cells and plays an important role in maintaining intestinal immune function. Thirdly, the micronutrient zinc can maintain normal appetite and growth and development, participate in the development of the reproductive system and the regulation of immune function, and participate in wound healing.

　　Insufficient dietary zinc intake has a certain impact on human blood zinc concentration and immune function. Studies have confirmed that zinc deficiency can quickly reduce the patient's antibody production and cellular immune function. On the contrary, short-term zinc supplementation can improve the body's defense system. Daily supplementation of 10 mg of zinc can significantly increase the synthesis of insulin-like growth factor-1 (IGF-1), thereby improving the body's immune function.

　　In addition, copper, iron, magnesium, and selenium deficiencies can also affect the body's immune function. However, it should be noted that excessive intake of many nutrients (such as iron and zinc) can also damage immune function. Therefore, it cannot be taken blindly and must be selected under the guidance of a nutritionist.

　　Dietary measures to enhance immunity: daily intake of 2 small cups of yogurt, 5-8 kinds of vegetables, 2-3 kinds of fruits, about 1 tael of one kind of whole grains and about 4 taels of one kind of potato every day； Eat deep-sea fish every other day, about 2-3 taels of fish each time ； Daily intake of 3 walnuts or 15 peanuts and other nuts ； 1 whole egg, 2-3 taels of lean meat every day ； Eat beans once every other day (measured as tofu, about 3-4 taels) ； Avoid high-sugar, high-fat foods and tropical fish. In addition, ensuring adequate sleep and sunbathing every day can also increase immunity.

　　Immunity-boosting foods

　　hawthorn . Helps digestion, protects cardiovascular, lowers blood lipids and blood pressure, is antibacterial, loses weight, anti-tumor, scavenges free radicals, and enhances immunity.

　　garlic . It has antibacterial, anti-inflammatory and anti-infective effects, can protect the normal functions of the liver and cardiovascular system, regulate blood sugar, lower blood lipids, prevent arteriosclerosis, and resist platelet aggregation.

　　sea ​​buckthorn . It is rich in vitamin C, which can resist fatigue and promote the hematopoietic system. It can also protect the digestive tract, remove free radicals, improve the function of the vascular system, and enhance immune function.

　　Spirulina . The protein content is as high as 60%-70%, and it is rich in carotene, vitamin E, and vitamin C, which can correct acidic physique and thereby improve human immunity.

　　pollen . Pollen is plant essence. Regular consumption can resist aging, fight fatigue, increase physical strength, and improve central system function.

　　aloe vera . Aloe vera has extremely strong vitality. Its main functions are heat-clearing and detoxifying, laxative, anti-inflammatory and antibacterial, enhancing immune function, stomach and liver protection, and skin care and beauty.

　　Propolis . Propolis can improve the ability of human macrophages to phagocytose viruses and bacteria, keeping the body's immune system in the best state of dynamic balance. It is called a "natural immune enhancer."

　　milk, soybeans . Milk and soybeans are both high-protein foods, which can enhance the resistance of respiratory tract and internal organs to infection, and can prevent viruses and bacteria from sticking to the respiratory tract. The soy protein in soybeans is highly digested, absorbed and utilized by the human body. It and milk protein can also form antibodies in the human body.