GNC is an American brand, and it is already the largest manufacturer and retailer of comprehensive health nutrition products in the world. They have two kinds of soy protein powder and whey protein powder, and they also have many flavors, such as chocolate and vanilla. Soybean protein is a complete protein, that is, the essential amino acids contained in protein are complete and rich, and the proportion of various amino acids is similar to that contained in human body, so it is easy to be absorbed by human body. Its characteristics are the same as protein contained in meat, eggs and milk, but it does not contain cholesterol and fatty acids in these substances. Whey protein powder is mainly used to replenish energy for muscles and improve physical fitness after exercise, hoping to help the landlord.'