L-Theanine From Green Tea Extract What Is L-Theanine? L-Theanine is an amino acid found in green tea that produces tranquilizing effects in the brain. L-Theanine is also a derivative of Glutamic Acid which is one of the neurotransmitters found in the brain. L-theanine may have the following application: 1) diminishing symptoms of PMS, 2) improving learning performance, 3) heightening mental acuity - neurotransmitter, 4) promoting concentration, 5) acting antagonistically against the paralysis induced by caffeine, 6) supporting the immune system, 7) lowering blood pressure, 8) increasing formation of the inhibitory neurotransmitter GABA, and 9) increasing brain dopamine levels among other positive benefits with no known downside. |