There is no scientific evidence to prove that protein powder can enhance immunity, and its use as a food does not have the effect of a drug. Protein powder is a nutritional food supplement for specific groups of people. The main raw materials are soy protein isolate, whey protein, soy lecithin, phytolipids, etc. It can provide the necessary nutrition for young children, the elderly, sports people, pre- and postoperative patients and weight loss people due to protein deficiency. Protein powder is a kind of health food, which is rich in amino acids and can directly supplement the protein needed by the human body. It is suitable for people who need to supplement a large amount of protein or cannot get protein from food. Healthy people do not need to consume protein powder, “Chinese residents dietary nutrient reference intake” in the recommended daily intake of protein for adults is 65 to 90 grams, through normal eating from the food can get enough protein. At the same time, too much protein intake can be harmful to the body. Be aware that as a health supplement, its effectiveness is limited and it cannot be used to treat diseases. It is important to note that excessive protein intake in patients with cirrhosis of the liver can increase the burden on the liver, and consumption of protein powder is usually not recommended for this group of people.