Protein is one of the three main essential nutrients that the body uses to fuel your muscles. This is, then, used for repair and muscle growth, which are necessary for your overall bodybuilding regimen. Protein supplements are great because they provide your body with the needed amounts of protein for these needs. In addition to protein, these supplements can also supply your body with other nutrients to help your muscles recover and grow. As a result, you’ll be more successful in gaining the right weight and muscle mass.