NUTRIJA L-Theanine each capsule / Pills provides you 200MG of pure L-Theanine found naturally in green tea. Theanine promotes relaxation, rejuvenation, and focus. Multiple studies have shown that theanine supports focus and concentration without the intense jitters you would commonly have after having an energy drink. Theanine exerts its efforts on several fronts, by supporting levels of inhibitory neurotransmitters in the brain and promoting a state of relaxation in the brain and restore a sense of calm. For example, L-theanine supports levels of GABA in the brain to promote a relaxed sensation, also the effects of theanine is believed to have a big impact on alpha brain wave activity, which is believed to help with an alert, and relaxed state of mind. L-Theanine helps promote a restful sleep, relaxed state while maintaining daytime alertness. L-Theanine helps promote a healthy mood. Best Brain Health Supplement for Natural Relaxation, Restoration and Relief of Stress. NUTRIJA L-Theanine is manufactured in USA based GMP certified facility in its purest form and derived from vegetarian source.