L-Glutamine

1 capsule daily Source Naturals L-Glutamine, a free-form amino acid, can be converted to glutamic acid. 

Glutamic acid is a precursor to the important inhibitory neurotransmitter GABA (gamma-aminobutyric acid). L-Glutamine also plays an important role in ammonia disposal. Product code: 021078016434 Cautions
Contains no yeast, dairy, egg, gluten, soy or wheat. Contains no preservatives, or artificial color, flavor or fragrance. Ingredients
Each capsule contains, 
L-Glutamine 500mg
Gelatin, Maltodextrin, Magnesium Stearate