If it is for the purpose of muscle building, in addition to adequate exercise, it is also necessary to supplement enough protein, so that the torn muscle fibers can be repaired by absorbing protein. Protein, which is close to the people every day, supplements food, such as eggs, but refers to egg white, which is rich in protein. It is suggested that 1 egg yolk is enough every day, and there are white meats such as chicken breast and fish, which are rich in protein and low in fat.