There are no studies that confirm the direct effect of food on improving immunity, and it is unrealistic to try to improve the immune system through food in cases of low immunity. If you have immunodeficiency diseases, especially for people with relatively low immunity, such as the elderly and children, you can improve your immunity by taking immunoglobulin capsules, pidomod oral solution, vitamin C preparations, or injections of thymidine injection, interferon, and human immunoglobulin for injection when you are sick. However, for normal people, there is generally no need to use immunity-enhancing drugs. Excessive immunity can, on the contrary, lead to an excessive response of the human immune system, such as the occurrence of allergic reactions. And although food can not enhance immunity, but you can strengthen the body nutrition and strengthen the body by eating foods rich in protein, vitamins, glutathione, etc. 1, protein-rich food: protein is an important part of the human body cells and involved in human activities, in the daily diet to supplement sufficient protein, to help strengthen the body, such as eggs, duck eggs, milk, goat milk, etc.. 2, vitamin-rich food: vitamin is an element indispensable to the normal life activities of the human body, but can not be synthesized through their own, can be obtained through food. For example, apples, oranges, broccoli, tomatoes, mushrooms, etc.; 3, food rich in glutathione: glutathione is a substance that can maintain the normal function of the immune system, food rich in this substance are onions, garlic, etc., so you can eat in moderation; 4, food rich in trace elements: there are some other foods rich in calcium, iron, zinc, potassium, sodium and other trace elements, can also help the body to maintain normal The physiological function of the body to improve the level of health, such as corn, wheat, walnuts, etc.