TheanineL theanine is a unique amino acid that is found almost exclusively in the tea plant (Camellia sinensis) and which has been used safely in Japan for decades. L theanine has been shown to positively modify brain waves and the key neurotransmitters involved in mood, focus, and memory.* L theanine enhances the production of the neurotransmitters dopamine and serotonin, and also appears to play a role in the formation of GABA a neurotransmitter that acts