MuscleTech Platinum Glutamine is a dietary supplement that plays an important role in building muscle, as it contains 5 grams of glutamine, which fills the body's need for glutamine, especially during exercise. When you do long workouts or endurance exercises your muscles lose about 50% of glutamine and this helps break down the muscles of the body, but don't worry, MuscleTech Platinum Glutamine amino acids control the muscle breakdown process by donating free nitrogen.