Glutamine is the most abundant amino acid found in the human body. It is an important component of muscle protein, necessary for building and repairing muscle. During times of physical stress, exercise and exertion glutamine reserves are often depleted. L-glutamine contributes to protein synthesis (muscle growth) and prevents muscle breakdown. L-Glutamine is important for maintaining healthy intestinal mucosa and helps reduce damage to the gut wall. It regulates acid balance, and is involved in protein synthesis and energy production.