Shares & Saves. Save. Protein is necessary for the body to repair itself and to achieve muscular growth. Amino acids create protein in the body. A balanced diet, rich in meat, vegetables and dairy, has the necessary amino acids that will allow your body to build the protein to create muscle.hares & Saves. Save. Protein is necessary for the body to repair itself and to achieve muscular growth. Amino acids create protein in the body. A balanced diet, rich in meat, vegetables and dairy, has the necessary amino acids that will allow your body to build the protein to create muscle.