Now Foods L-Glutamine 500 mg Veg Capsules
 
Glutamine is considered to be a conditionally essential amino acid, which means that under certain circumstances, the body may require more glutamine than it can produce. In the body, glutamine functions as a major nitrogen transporter and is critical for the maintenance of healthy nitrogen balance.* Glutamine also acts as the primary fuel for the rapidly growing cells of the immune system and GI tract.*