Optimum Nutrition Glutamine

Optimum Nutrition’s GLUTAMINE POWDER delivers 5 g of the amino acid L-Glutamine in every serving. Muscle is broken down during your workout. After training, your body uses protein to repair the muscle fibers. Glutamine is one of the important building blocks of protein. Glutamine comprises more than 60% of skeletal muscle's free amino acid pool and greater than 20% of total circulating amino acids.