This naturally occurring non-protein amino acid is found in tea leaves. This amino acid has demonstrated wide-ranging physiological activity, including lowering blood pressure, inducing relaxation and reducing stress. This amino acid has been shown to cross the blood-brain barrier, causing significant increases in brain concentrations of the neurotransmitters (chemicals that transmit nerve impulses), serotonin and dopamine. This amino acid has also been shown to stimulate the brain’s production of alpha waves, which indicates an awake and alert, yet relaxed state. In addition, animal research suggests that this amino acid may help reduce weight and abdominal fat stores, as well as lower serum triglycerides. What is this non-protein amino acid?