Use
In catabolic states of injury and illness, GLN becomes conditionally-essential (requring intake from food or supplements). Glutamine has been studied extensively over the past 10-15 years and has been shown to be useful in treatment of serious illnesses, injury, trauma, burns, cancer and its treatment related side-effects as well as in wound healing for postoperative patients (citation pending). That is why it is now also classified as a "nutraceutical". Glutamine is also marketed as a supplement used for muscle growth in weightlifting, bodybuilding, endurance and other sports.