Glutamine functions as a precursor for other amino acids, purines and pyrimidines, and glutathione. Muscle, lung, and adipose (fat) tissue are major sources of glutamine in circulation, and these tissues increase glutamine production during catabolic states (i.e., during metabolic breakdown, such as occurs during intense exercise). However, during physical stress, the body actually can consume more glutamine than the skeletal muscle can produce. Oral glutamine supplements are purported to boost athletic performance, promote muscle gain, and/or repair and improve immune function after physical stress. During exercise, glutamine concentrations in the body may change depending on the type, duration, and intensity of exercise. Glutamine also helps promote gut and intestinal health.
L-Glutamine vastly improves recovery times from injury, mental stress, surgery and day-to-day sports related tissue damage. Also, since glutamine is a powerful anti-oxidant, people find they have increased resistance to colds. For sport uses, athletes note increased power and endurance. The benefits of Glutamine are not only for athletes. Non-athletes will experience the same benefits, with no side effects.