L-Glutamine is an amino acid that is quite prevalent in the body naturally. L-Glutamine is energy sources utilized by rapidly proliferating cells. It is a major fuel source for the brain and together with its relatives the stimulant neurotransmitter. Glutamic acid the most abundant amino group in the human brain. Glutamine plays a vital role to building and maintenance of muscle tissue. Glutamine helps the body maintain a healthy balance and necessary for making and repairing cells. Its also helps in Depression and Mood Disorders, General Energy Booster, Mental Energy, Insulin Resistance, Exercise Endurance, Stress Tolerance, Gastrointestinal Disorders. Glutamine is a supplement that is used in weightlifting and bodybuilding, as well as those who suffer for muscular cramps or pain - particularly elderly people. The main use of glutamine within the diet of either groups is as a means of replenishing the body's stores of amino acids that have been used during exercise or everyday activities.