this sounds very interesting. i know that valium works on GABA receptors in the brain, and dopamine can help relieve depression.i might want to give it a try. did it make you very sleepy? if you take it at night does it give you a hangover?quote: Theanine increases GABA (gamma-amino-butyric acid), an important inhibitory neurotransmitter in the brain. GABA can be considered the brain's natural sedative that brings balance to excitability that can sometimes lead to restlessness, insomnia, and other disruptive conditions. Theanine also increases levels of dopamine, another brain chemical with mood-enhancing effects.