PrimaForce GlutaForm contains high quality l-glutamine. Glutamine is the single most abundant amino acid found in skeletal muscle and is heavily metabolized during intense training. Glutamine is highly in demand throughout the body. It is used in the gut and immune system extensively to maintain optimal performance. Research suggests that after intensely working out, glutamine levels in the body are reduced by as much as 50%. Since the body relies on glutamine as cellular fuel for the immune system, scientific studies have suggested that glutamine supplementation can minimize the breakdown of muscle tissue and improve protein metabolism.