Glutamine from GN™ is the purest & highest quality Glutamine available in nutrition today. Glutamine is reported to perform a number of vital functions within the body, including aiding in the recovery & repair of muscle tissue. Glutamine is also implicated as playing a key role in the replenishment of glycogen stores & immune function, making it a great choice whether you are training for strength, power & lean muscle gains, or endurance performance..