It can help build muscles by increasing the lean muscle mass in the body. (healthadviceworld.com)
The theory is that protein powder can help increase your lean muscle mass based on the extra protein you would consume. (liftingrevolution.com)
If your goal is to substantially increase your lean muscle mass while burning off excess body fat, 5 x 5 training might be just the right thing for you. (fitnessandpower.com)