Dietary Supplement. 100% Micronized. HPLC tested for purity. Metabolic Performance Series. Supports muscle growth & recovery. Supports immune & intestinal health. (These statements have not been evaluated by the Food & Drug Administration (FDA). This product is not intended to diagnose, cure, treat or prevent any disease.) L-Glutamine, commonly referred to as a conditionally essential amino acid, is the most abundant amino acid in the body (including the brain, muscle and blood). In muscle, the concentration of the free glutamine appears to influence whether muscle will be broken down (catabolism - low glutamine content) or built up (anabolism - high glutamine content). (These statements have not been evaluated by the Food & Drug Administration (FDA). This product is not intended to diagnose, cure, treat or prevent any disease.) Glutamine acts as a nitrogen shuttle by picking up and dropping off nitrogen around the body. Nitrogen is an essential component of DNA, and vital for building muscle. Glutamine is a prominent contributor to the functional integrity of the intestines and serves as an energy source for these highly active cells. Overall, L-Glutamine supports muscle growth and recovery, immune and intestinal health, brain energy and elicits powerful anti-catabolic properties. (These statements have not been evaluated by the Food & Drug Administration (FDA). This product is not intended to diagnose, cure, treat or prevent any disease.) No excipients added. Contains no common allergens, artificial flavoring or colors.