They may also look for ways to control their appetite when they're trying to lose weight, as part of a bodybuilding diet. Protein is considered the basic nutrient in repairing muscle that is broken down during weightlifting and for muscle maintenance and growth. The recommended dietary allowance per day for protein is 0.8 g/kg. However, research shows that a greater amount of protein is needed for weightlifters. Depending on a person’s level of activity, the amount of protein needed for a bodybuilder is greater than the RDA, but not more than 1.5-2 g/kg.