Supports Muscle Cell Recovery Restores Glutamine Levels Naturally and Artificially Flavored Dietary Supplement 50 Servings GMP Compliant Glutamine is the most abundant free amino acid in the body. During prolonged periods of strenuous exercise, glutamine levels may drop, causing stress to the body and leading to muscle breakdown. COR-Performance Glutamine is a great choice after a workout to help the body replenish glutamine levels which play a role in protein synthesis and muscle cell recovery.