You can eat amino acids, which can play the following roles through metabolism in the human body: ① Synthetic tissue protein; (2) into acids, hormones, antibodies, creatine and other ammonia-containing substances; (3) into carbohydrates and fats; ④ Oxidation into carbon dioxide, water and urea to generate energy. Therefore, the existence of amino acids in human body not only provides an important raw material for the synthesis of protein, but also provides a material basis for promoting growth, normal metabolism and maintaining life. Amino acids have some functions of supplementing nutrition and enhancing immunity, and also have some benefits for improving immunity.

You can also eat propolis, propolis: propolis can help you improve your ability to resist various bacteria and viruses, so that the body's immune system can reach a balance, and it belongs to one of the immune enhancers. You can also eat antioxidants such as vitamin C and vitamin E.

There are many foods to improve immunity, such as tomatoes, Hericium erinaceus, lilies, spinach, apples, yogurt, ginger, honey and so on.