Glutamine is a conditionally-essential amino acid that is used in the biosynthesis of proteins in the human body. Typically, sufficient amounts of glutamine are produced naturally and obtained from the diet, however, in certain cases, such as sickle cell anemia, supplementary quantities are required to meet the metabolic glutamine needs of patients. Manufacturers of glutamine produce pharmaceutical formulations with it as the standalone ingredient as well as use it in combination with other substances such as sodium galenite. Glutamine suppliers market such formulations as oral powders, capsules, and pills. The costs per 200g of glutamine powder are approximately 20 EUR.