L-glutamine is known for its ability to promote mental capacity and the maintenance of a healthy digestive system. Its main function is the proper operation of the intestine, although it is found only in muscles, skin, and internal organs such as the kidneys and liver.
L-glutamine has recently become the focus of many scientists. More and more evidence suggests that during certain stressful conditions (such as intense weight training), the body may require more glutamine than it can produce. Under these conditions, glutamine can be considered a conditionally "essential" amino acid. It is considered an essential amino acid (although it does not belong to the typical list of 8 essential amino acids). L-glutamine participates in maintaining a positive nitrogen balance (an anabolic state), ideal for those engaged in increasing muscle mass. It also supports the rapidly growing cells (lymphocytes of the immune system) and intestinal cells (enterocytes).
Furthermore, L-glutamine is a regulator of the body's acid-base balance and a carrier of nitrogen. In the brain, L-glutamine is converted to glutamic acid, which is essential for brain function. It also increases the amount of gamma-aminobutyric acid (GABA) for maintaining proper brain function and mental activity.