L-Glutamine PowderThorne's L Glutamine Powder is NSF Certified for Sport. Evidence suggests supplemental L glutamine benefits gastrointestinal health, supports wound healing, maintains immune health, and helps restore plasma glutamine levels depleted after periods of physical stress, such as prolonged exhaustive exercise.* L glutamine is the most prevalent amino acid in the bloodstream. It is found in high concentration in the gastrointestinal tract, which is its