L-Theanine is a non-essential amino acid that is present in the brain and is a close relative of Glutamate. Studies indicate that L-Theanine interacts with the neurotransmitter, GABA (Gamma-Aminobutyric Acid). GABA, known for its importance in nervous system functioning, works with the mood centers of the brain.
L-Theanine exerts beneficial effects on brain metabolism and induces relaxation without causing drowsiness, as measured by increased generation of alpha-waves. L-Theanine may improve learning ability and sensations of pleasure by affecting dopamine and serotonin neurotransmitters in the brain.