L-Glutamine is the most abundant amino acid in the circulation. L-Glutamine is stored primarily in skeletal muscle. Found in high concentration in the gastrointestinal tract, L-Glutamine is the preferred fuel for the enterocytes of the small intestine. Thorne Research offers L-Glutamine in powder form as an efficient method of supplementing in high dosages. Each Scoop Contains: Glutamine (as L-Glutamine) 3800.00mg.