GNC PRO PERFORMANCE L-GLUTAMINE 1500 MG plays an important role in muscle function pre- and post-exercise. Supplementation may help maintain glutamine levels that have been depleted as a result of intense exercise and may support muscle function. Glutamine is involved in protein synthesis and plays a pivotal role in the body's nitrogen balance. It serves as a fuel for the immune system and maintenance of proper intestinal function. This dietary supplement comes in a bottle containing 180 capsules.