It is necessary for rapidly dividing cells, including those of the gut and immune system.
The function of glutamine in stimulating glycogen synthase, the enzyme which controls the synthesis and storage of glycogen fuel in muscles and liver, may provide a mechanism by which glutamine supplements promote enhanced fuel stores. Life Extension L-Glutamine 500 mg - 100 Vegetarian Capsules Glutamine is an important fuel for some immune cells, such as lymphocytes and macrophages, that may have specific immunostimulatory effects. It is also used as an energy source in mitochondria, and is a precursor of the brain neurotransmitter glutamate.