It is not only people who exercise and keep fit who can drink protein powder. People who lack protein and can't get enough high-quality protein from their diet can effectively supplement protein by drinking protein powder. Protein is an essential nutrient for human growth and development. Lack of protein will not only reduce muscle strength, but also lead to decreased immunity. For people who usually exercise a lot, drinking protein powder can replenish the lost protein in time and help muscle growth, which is much more efficient than eating food. People with low immunity can also drink protein powder to enhance immunity, improve disease resistance, maintain cell activity and promote metabolism. Protein plays a certain role in keeping healthy, which is why people drink milk and eat eggs to supplement protein. Whey protein powder, as an animal protein, is favored by most people because its protein structure is very similar to that of human body and it can be better absorbed and utilized by human body. In addition, whey protein contains all essential amino acids that are not found in plant protein. Now there are many protein powders with other ingredients on the market, which can meet the needs of all kinds of people. For example, for women, whey protein powder containing collagen peptide can be selected to help replenish the lost collagen.