Theanine 200 is a dietary supplement manufactured by Jarrow Formulas, based in Los Angeles. The product is marketed as a relaxant, a mood support, beneficial for the brain metabolism. The company claims that the product does not cause drowsiness and that it may improve learning ability. The formula includes one active ingredient – L-Theanine (200 mg), a neurologically active ingredient found in green tea leaves.
Positive testimonials recommend the product as helpful to manage stress and to stay focused. Caution is recommended when associated with medication for high blood pressure. It may cause the blood pressure to go too low, as stated by one consumer.