Optimum Nutrition Glutamine 1000mg Caps are specially formulated for rapid degeneration and maximum absorption. Glutamine is the most abundant amino acid in the body making up more than 60% of the amino acid pool in the skeletal muscle and more than 20% of amino acids of the total circulating animo acids. Glutamine 1000 are made from the highest quality glutamine that is available. Glutamine 1000 supports the bodies muscle recovery.