Beyond The Basics: Glutamine Powder Product Highlights: Made with Pure L-Glutamine Unflavored Versatility Easily Add to Protein & MRP Shakes Wide Variety of Available Sizes Supports Muscle Recovery Efforts* Mixes Easily with a Spoon Glutamine is the most abundant amino acid in the body, comprising more than 60% of the free amino acid pool in skeletal muscle and greater than 20% of total circulating amino acids. Supplemental L-Glutamine may help reduce muscle soreness and rebuild muscle tissue. Optimum Nutrition's Glutamine Powder is made from pure L-Glutamine and is flavorless, making it easy to mix in with post workout shakes and meal replacement drinks.