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.* This double strength product has twice the L-Glutamine (1 000 mg per capsule) as in our regular strength product (500 mg per capsule).