L-Glutamine powder 227g by Pure EncapsulationsWhat Is It? l Glutamine is the most abundant amino acid in the body. In times of stress or increased metabolic demand, glutamine is an especially important source of energy for the GI tract. It also supports muscle health and immune system function.* Uses For l Glutamine Gastrointestinal Health: In the gut, glutamine maintains healthy integrity of the intestinal tract and enhances the protective mucosal lining. This helps to ensure proper nutrient