Solaray L-Glutamine provides free form of L- Glutamine, known to be the most common free amino acid in the body and key building blocks of protein. Glutamine functions as primary fuel source of cells in gastrointestinal and immune systems. Because your body needs more L-glutamine than it can produce under normal conditions like during intense workout or prolonged physical stress , L-glutamine supplementation may support healthy muscle growth and maintenance, healthy digestion, healthy immune function. Benefits: Helps in muscle recovery Aids digestion Antioxidant activity Supports immune function