L-glutamine men - L Glutamine - Improve immune response (3 Bottles) L-Glutamine - is essential for maintaining intestinal function and aiding in the immune response. After glutamine is synthesized in skeletal muscle it is released into the bloodstream and transported to the kidney, liver and small intestine and cells of the immune system where it plays another vital role. L-Glutamine - studies have shown that L-Glutamine supplementation can minimize breakdown of muscle and improve protein metabolism. Since L-Glutamine levels deplete during workouts, bodybuilders are more susceptible to illnesses - this is why L-Glutamine supplementation is so important, not necessarily to gain more muscle, but for the 'maintenance' effects of L-Glutamine. L-Glutamine is one of the most important nutrients for your intestines. It has the ability to repair stomach lining by maintaining the structural integrity of the bowels. L-Glutamine - research has shown L-Glutamine can help you produce increased hormone levels. A study has shown 2 grams of L-Glutamine increased hormone level by over 400%.