Prolab Glutamine is a flavorless, free form amino acid formula in an easy-mixing powder. L-Glutamine is the most abundant, naturally occurring amino acid found in muscle tissue. It can be depleted during prolonged training so supplementing with Glutamine is important. This will help build new lean muscle and protect hard-earned gains by supporting protein synthesis. L-Glutamine also supports acid-base homeostasis. L-Glutamine helps restore post-workout muscle energy, volumization, and repair. This "conditionally essential" amino acid functions as a critical factor in muscle form and function.†