Improves Muscle Recovery Immune System Booster 100 Servings Dietary Supplement 100% Pharmaceutical Grade GlutaLean 100% Pure L-Glutamine contains only pure brand pharmaceutical grade L-Glutamine. Glutamine is an amino acid that accounts for approximately 60% of all free amino acids in the body. Muscle tissue contains especially high concentrations of glutamine. Supplemental glutamine can help prevent muscle tissue breakdown, increase protein synthesis, increase glycogen storage (energy stores) in muscle, and supports healthy immune function. Quality Guarantee Seal - Every Labrada products is tested by an independent lab for purity and potency. Only then does it earn this seal. With Labrada products you get what you pay for. Lee Labrada's Quality Guaranteed "If it's on the label, it's in the bottle! This product is independent lab assayed for purity.