100% USP GRADE L-GLUTAMINE. Supports Muscle Recovery. L-Glutamine-The Athlete's Amino Acid. Glutamine is the most abundant amino acid in the body. It serves a broad range of critical roles, including immune function support, digestive tract health, energy production and in the building and protecting of its own glutamine stores; therefore, it is considered to be a 'non-essentials' amino acid. However, during times of stress (both physical and mental), increased demand for glutamine may far outpace the body's ability for produce it. This is when glutamine becomes a 'conditionally essential' amino acid for ensuring optimal physiological functions. This is why supplemental glutamine intake is immeasurably beneficial for supporting the needs of hard-training athletes and fitness enthusiasts. CytoSport L-Glutamine is 100% pure Ajipure L-Glutamine. Why did we choose Ajipure? Simple-it meets our exceedingly high standards of excellence. Ajipure delivers pharmaceutical grade- L-glutamine for unprecedented quality and efficacy. Rest assured-when you consume CytoSport L-Glutamine-you are 'feeding' your body with the highest quality L-Glutamine money can buy. Why settle for anything less?