From the perspective of TCM health preservation, after entering winter, human metabolism slows down and consumption is relatively reduced. At this time, tonic can store the energy transformed by nutrients in the body, thus enhancing the body's resistance, nourishing the five internal organs and enhancing resistance. The elderly have decreased physical function and low resistance, which is more suitable for nourishing in cold season. It is recommended to eat more foods rich in protein, vitamins and digestible foods. You can choose cereals such as wheat and peas; Vegetables such as radish and day lily; Meat and aquatic products such as eel, hairtail and shrimp; Coconut, longan and other fruits. Mutton and stewed chicken are also good products for the elderly to nourish in winter. In addition, the elderly with qi deficiency can take some tonics, such as astragalus and ginseng. Old people with blood deficiency can eat some supplements such as Ejiao and Rehmannia glutinosa. Old people with yang deficiency can eat some cistanche deserticola, mistletoe, Alpinia oxyphylla and so on. Old people with yin deficiency can eat some supplements such as Gynostemma pentaphyllum and Polygonatum odoratum. However, the elderly should not blindly take tonic, and the use of tonic should be carried out according to the specific situation.