Spring is the season when everything grows and everything gets close. The Yellow Emperor's Internal Classic Su Wen wrote: "Spring and March are called Chen, heaven and earth are born, and everything is glorious." This means that in the three months of spring, all creatures are new and full of vitality. People should adapt to the season, recuperate their vitality, and unify their bodies with the outside world, which is called "the response of spring spirit, the way of keeping in good health". For the elderly, more attention should be paid to diet in spring to ensure health and longevity. In early spring, the temperature is still cold, and the human body needs to consume some energy to maintain the basal body temperature to keep out the cold. Therefore, the nutrients in early spring should be mainly high in calories. In addition to cereal products, you should also choose foods such as soybeans, sesame seeds, peanuts and walnuts to supplement energy substances in time. Because the cold stimulation will accelerate the decomposition of protein, which will lead to the decline of body resistance and cause diseases, it is necessary to supplement high-quality protein foods such as eggs, fish, shrimp, beef, chicken, rabbit meat and bean products in early spring. The above foods are rich in methionine, which can enhance the cold tolerance of human body. Spring is also the season when the climate changes from cold to warm, and the temperature changes greatly. Bacteria, viruses and other microorganisms begin to multiply in large numbers, and their vitality is enhanced, which is easy to invade the human body and cause diseases. Therefore, we should take enough vitamins and inorganic salts in our diet. Fresh vegetables such as Chinese cabbage, rape, persimmon pepper and persimmon, and fruits such as citrus and lemon are rich in vitamin C and have antiviral effects. Yellow-green vegetables such as carrots and amaranth are rich in vitamin A, which can protect and increase the epithelial cells of the strong upper respiratory mucosa and respiratory organs, thus resisting the invasion of various pathogenic factors; Food rich in vitamin E should also be eaten to improve human immune function and enhance the body's disease resistance. This kind of food includes sesame, blue cabbage and cauliflower. Motherland medicine also believes that "spring should be sour and sweet to nourish the temper." This is because when the liver qi is strong in spring, it will affect the spleen, so it is easy to appear spleen and stomach weakness in spring; Moreover, eating more sour food will make the liver function high, so the spring diet should be nursed back to health, and it is advisable to choose spicy and warm products to avoid acidity. Diet should be light and delicious, avoid greasy, cold and irritating food. In addition, spring is the off-season of vegetables, but the growth period of wild vegetables and mountain vegetables is earlier than that of ordinary vegetables, and they are rich in vitamins, so they can be picked and eaten to supplement the shortcomings of ordinary vegetables.