Biocare l glutamine powder 200g biocare l glutamine powder is a daily food supplement containing nothing but 5g of l glutamine per serving glutamine is the most prevalent amino acid in the human body and is mostly stored in the muscles and the lungs in fact 61 of skeletal muscle is glutamine while 19 is nitrogen making l glutamine the principal carrier of nitrogen in the body vegan vegetarian friendly plays a key role in protein synthesis involved in a variety of metabolic processes