Elderly people drinking protein powder can be selected according to the nutritional needs of the elderly, if it is a daily supplemental protein, the elderly is recommended 1~2 times a day. The elderly take protein powder, mainly to supplement nutrition, 1~2 times a day can be, each time 5-10 grams, not too much. If you drink too much protein powder every day, it will increase the burden on the kidneys and gastrointestinal tract, which is not conducive to the body’s absorption and metabolism. The maximum protein intake proposed by the Dietary Guidelines for Chinese Residents is 0.92 grams per kilogram of body weight (including protein in food), and if it exceeds this amount, it may cause burden to the liver. In general, protein powder is more suitable for sports people, developing teenagers, middle-aged and elderly people as well as patients with nutritional deficiencies to help replenish the lack of protein. Elderly people with nutritional deficiencies can consume more foods rich in protein, vitamins and trace elements, such as eggs, milk, beans, fresh vegetables and fruits. If an elderly person suffers from severe malnutrition, it is recommended to go to the hospital to find out the cause of the nutritional deficiency before treating accordingly. Elderly people who suffer from liver and kidney function diseases, or wasting diseases, need to develop a personalized protein powder consumption plan under the guidance of a doctor. Those who are allergic to protein powder ingredients such as eggs and soybeans should not consume protein powder.