Glutamine is considered a conditionally essential amino acid. It's the only amino acid with 2 nitrogen molecules per amino, which offers double the value in aiding nitrogen retention. ATP Science's L-Glutamine supports muscle retention for endurance athletes, as well as muscle-building properties for weight lifters.
This supplement is also vital in supporting gut health because it helps to rebuild and repair the gut wall. Best taken before or directly after training, L-Glutamine may strengthen immunity. Circulating glutamine is an important substrate for the enterocyte, hepatocyte, and immune cells as an oxidative fuel. It is also a substrate for nucleotide synthesis.