L-Glutamine is one of the non-essential amino acids in humans. The body uses L-Glutamine to create proteins, so-called amino sugars, and to support the production of super-antioxidant glutathione. It also uses L-Glutamine to increase water retention in muscle cells, help signalling cell growth and start intensifying production of protein and glycogen. A pronounced lack of L-Glutamine can be detected particularly during times of metabolic ill-health, such as after difficult operations, or when suffering from injuries or burns. This often means that appropriate supplementation becomes necessary. Even existing infections can lead to an increase in need for Glutamine, and these too regularly require extra L-Glutamine provision using nutritional supplements.