First of all, we must ensure the supply of heat energy. The cold climate in winter affects the endocrine system of human body, which increases the secretion of thyroxine and adrenaline, thus promoting and accelerating the decomposition of protein, fat and carbohydrate, increasing the body's cold-proof ability, thus causing excessive loss of heat. Therefore, nutrition in winter should be based on increasing heat energy, and foods rich in carbohydrates and fats can be properly ingested. Such as lean meat, eggs, fish, milk, beans and their products. Protein contained in these foods is not only easy for human body to digest and absorb, but also rich in essential amino acids with high nutritional value, which can increase human body's cold resistance and disease resistance.

Winter is also the off-season of vegetables, and the number of vegetables is small and the varieties are monotonous, especially in northern China. Therefore, after a winter, vitamin deficiency occurs in the human body. The prevention and treatment methods should first expand the food sources. In winter, green leafy vegetables are relatively reduced, and you can eat some potatoes, such as sweet potatoes and potatoes. Are rich in vitamin C and vitamin B, especially lack of vitamin A, and red sweet potatoes also contain more carotene. Eating more potatoes can not only supplement vitamins, but also clear away heat and eliminate plague. In addition to Chinese cabbage, cabbage, radish heart, white radish, carrot, bean sprouts, mung bean sprouts, rape and so on. It should also be selected in the main course listed in winter. These vegetables are rich in vitamins. As long as the varieties are changed frequently and matched reasonably, the vitamin demand of the human body can still be supplemented.