Glutamine Powder™ from Universal Nutrition provides the purest, most active L (Levo) form of glutamine available for athletic supplementation. Glutamine is considered to be a “conditionally” essential pro-anabolic amino acid. Glutamine may be the most important variable in promoting optimum protein synthesis, while helping block cortisol to prevent protein breakdown in muscle. Many athletes use glutamine to aid in recovery and to help reduce the breakdown of lean muscle.