It is recommended for the general fitness crowd to supplement 1.2g/kg body weight to 2.0g/kg body weight every day. It is suggested that 1.2 g/kg body weight should be given to people who are losing fat, and 2.0 g/kg body weight should be given to people who are gaining fat. If a person is a muscle exerciser and weighs 80 kilograms, it is necessary to supplement 160 grams of protein every day. In terms of choice, we can add some protein with fast absorption and some protein with slow absorption. Eat and absorb quickly after practice, and eat and absorb slowly at other times. It is best to choose a variety of foods to supplement, rather than relying on a single food to supplement. Usually, protein-rich foods include eggs, milk, chicken, beef, pork and mutton. Fitness supplements include whey protein powder and so on.