Theanine is a unique amino acid found almost exclusively in green tea that exerts beneficial effects on brain metabolism.* Theanine induces relaxation without causing drowsiness, as measured by increased generation of alpha-waves.* Theanine may improve learning ability and sensations of pleasure by affecting dopamine and serotonin neurotransmitters in the brain.* Also, theanine exerts protective effects on the brain by mitigating glutamate toxicity.* Jarrow Formulas® Theanine is made enzymatically from amino acids and is identical to the theanine found in green tea. Ingredients L-Theanine 200 mg Other Ingredients:Cellulose, magnesium stearate (vegetable source) and silicon dioxide. Capsule consists of hydroxy-propylmethylcellulose. No wheat, no gluten, no soybeans, no dairy, no egg, no fish/shellfish, no peanuts/tree nuts. NOTE: If you have a medical condition, are pregnant, lactating, trying to conceive, under the age of 18, or taking medications, consult your healthcare professional before using this product. Usage Take 1 capsule per day with water or juice on an empty stomach or as directed by your qualified healthcare professional. Size 60 vegetable caps