Protein is an essential nutrient, and we must supplement it every day. However, the amount needed to be supplemented is not much, and the quality protein is about 0.8 grams per kilogram of body weight every day. For people with a normal diet, this amount is not difficult to achieve. Protein is not the more the better. After amino acids enter the body, if they are not used to make protein, they will be deaminated in the liver, converted into carbohydrates to provide energy, or converted into fat for storage, thus making people fat. Fitness protein powder is a kind of protein powder specially designed for people who gain muscle and weight obviously through fitness. Its main component is whey protein, which has a high absorption and utilization rate. After exercise, the body can absorb fitness protein powder faster and better, thus meeting the needs of muscle growth.