Glutamine is the most abundant amino acid in your body and in your muscles. In fact, 61% of skeletal muscle is made up of this important amino acid. During intense workouts glutamine is depleted from your body which can negatively effect workout recovery. Supplementing with glutamine can therefore help with workout recovery. Glutamine plays an important role in improving protein synthesis and minimizing protein breakdown (anti-catabolic). Glutamine can also increase your body's human Growth Hormone (HGH) production which may further help with both new muscle growth and fat metabolism. Two grams of glutamine have been shown to increase HGH by over 400%. In addition to the above, glutamine also improves immune system functioning, brain functioning and intestinal health. Glutamine has also been shown to decrease sugar cravings which is helpful for those wishing to lose weight and stay on their diet. A serious fitness enthusiast may want to take up to 10 grams per day- 5 grams after workouts and another 5 grams at night. Taking a dose at night will optimize the HGH spurt that naturally occurs during sleep.