GNC Pro Performance® L-Glutamine 5000 Mg GNC Pro Performance® L-Glutamine Is A Key Amino Acid For Muscles . Supplementation May Help Maintain Glutamine Levels That Have Been Depleted As A Result Of Intense Exercise. Glutamine Is Involved In Protein Synthesis And Plays A Pivotal Role In The Body's Nitrogen Balance. ˆ It Serves As A Fuel For The Immune System And Maintenance Of Proper Intestinal Function. Tested And Certified Banned Substance Free♦ Gluten And Lactose Free Mixes Easily With Your Favorite Beverage. ˆwhen Used In Conjunction With An Exercise Program. | GNC Pro Performance L-Glutamine 5000Mg - Unflavored (45 Servings)