Glutamine is a non-essential protein amino acid that makes up to 60% of the amino acid content of muscle cells.
During stressful situations, such as physical exertion, stress, illness, there is athe release of glutamine from muscle cells occurs at an increased rate, the so-called "glutamine release". catabolism.
Even if the body "knows" how to create glutamine from other amino acids (valine, isoleucine, leucine, glutamic acid), the amount created is not sufficient and needs to be supplied externally.