1, protein food. Protein is the key substance of human immune system, and the essence of antibody is protein substance with special function. Therefore, in order to enhance physical fitness and improve resistance, it is necessary to ensure that a certain amount of protein is regularly ingested from food. Protein mainly comes from milk, eggs, fish and shrimp, lean meat, soybeans and products.

2. Red wine. Red wine, like pistachios, only contains prebiotics that can nourish probiotics in the body. The study found that two glasses of red wine a day, compared with gin or non-alcoholic red wine, the number of beneficial bacteria in the intestinal flora will increase significantly after four weeks. Polyphenols in red wine, powerful antioxidants and alcohol may be the reasons.

3, garlic. Garlic contains allicin, and allicin has the effect of resisting infection and bacteria. Studies have shown that people who eat garlic regularly can reduce the incidence of colds and stomach cancer. Therefore, eating garlic every day is beneficial to our health.

4. Dark green and orange vegetables. Experts say that orange vegetables are rich in carotene, which can be converted into vitamin A in the human body. Vitamin A can enhance the function of human epithelial cells and produce resistance to cold viruses. It can strengthen the mucous membranes of the throat and lungs and maintain their normal metabolism.

5, buttermilk. This kind of milk with strong taste is not made of butter, but fermented by lactic acid bacteria and cultivated probiotics. You may not know how surprisingly low the calories of buttermilk are: a cup of low-fat buttermilk has only 98 calories, and it also provides us with 28% of the daily calcium and 8 grams of protein.

6. Broccoli. Broccoli is a very common vegetable. Studies have shown that broccoli has the effect of enhancing immunity. So it is also a good choice to stir-fry broccoli occasionally.

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