APS uses 100% vegetable based, naturally fermented Ajinomoto pharmaceutical L-Glutamine only! You simply cannot get any better glutamine. We ship from our own FDA registered and inspected GMP manufacturing facility direct to your door. No middlemen to mark up the price and no old or expired product like most re-sellers ship. This is the freshest and purest glutamine available – guaranteed. Glutamine is the most abundant amino acid in the body. It plays a crucial role in cell volumizing and has powerful muscle building effects, promoting protein synthesis while inhibiting protein breakdown. Loading with glutamine may even increase the secretion of growth hormone. Studies show that supplementing with as little as two grams of free-form L-Glutamine may boost your growth hormone levels by as much as 400%.