L-Glutamine is a branched chain, non-essential amino acid. It is one of the most abundant amino acid found in central nervous system (CNS), plasma and human skeletal muscle.(2) L- Glutamine is synthesized by transamination of glutamate catalyzed by glutamine synthetase.
L-Glutamine, a source of nitrogen, mainly contributes to the synthesis of proteins, peptides, purine, pyrimidine, nucleotides, nucleic acids and major precursor of neurotransmitter. It acts as a fuel for the proliferation of lymphocytes and macrophages of immune system, for intestinal tissue to maintain gut integrity and for insulin production.(4)(3) L-Glutamine is released by skeletal muscle during stress conditions.