A key for many biological functions L-glutamine is the most abundant free amino acid in the body. It is critical for many essential functions including the optimal operation of the kidneys, pancreas, gall bladder, liver, intestines and the brain. It is the most important amino acid for maintaining nitrogen balance. It supports the immune system and is a precursor for glutathione, one of the body’s most important antioxidants. In times of stress Although glutamine can be synthesized in the body, it becomes seriously depleted during conditions of stress such as injury, infection or strenuous exercise. During these conditions, glutamine is consumed faster than it is synthesized, and its shortage can lead to complications. Glutamine supplementation enhances the immune system by serving as fuel for immune cells. Glutamine supplementation also benefits muscles and the gastrointestinal system during conditions of stress. Glutamine’s ability to enhance growth hormone makes it a valuable supplement for athletic performance.