Glutamine is the most abundant free amino acid found in the muscles of the body. Its ability to easily pass the blood-brain barrier makes it an effective brain fuel. In the brain, glutamine is converted into glutamic acid, a neurotransmitter essential for cerebral function. Suggested Use: As a dietary supplement, take one capsule one to two times per day with water on an empty stomach or as recommended by your healthcare provider. WARNING: Pregnancy and breast-feeding: Not enough is known about the use of glutamine during pregnancy and breast-feeding. Stay on the safe side and avoid use. Ingredients per Serving: L-Glutamine 500 mg