L-glutamine is the most abundant amino acid in the blood and in muscle cells. It is classified as a conditionally essential amino acid, which means that the body is normally capable of manufacturing enough to meet its metabolic needs. Glutamine has several functions including the support of immunity, gastrointestinal integrity, insulin secretion, neurological activity, and muscle protein synthesis. Glutamine actually supplies 35% of nitrogen to muscles to synthesise proteins. This, in turn, will promote protein synthesis. Why is this important? Well, the benefits of maintaining a high nitrogen balance in the muscle prevents muscle breakdown, therefore retaining more muscle. This equates to a leaner you! A leaner you means you have less body fat, so, in essence, glutamine may help with the reduction of overall body fat.