Serene Science. Focused Relaxation. L-Theanine is a unique amino acid found almost exclusively in the tea plant (Camellia sinensis) and contributes to the unusual taste of green tea. Human studies have shown that taking L-theanine affects the emission of alpha waves in the brain associated with states of relaxation and focused attention. Preliminary research has shown that L-theanine crosses the blood brain barrier and suggests that it may support healthy neurotransmitter levels in the brain and inhibit the stimulatory properties of caffeine.
"I read about L-Theanine a few years ago. Caffeine, especially coffee or dark chocolate make me very jittery and I love both. I read that taking L-Theanine calms the nerves without sedating. I take it when I eat or drink anything highly caffeinated and sometimes just to calm stressful situations. I recommend reading about this supplement."
"I use this each morning and feel calmer and yet more energetic since I started taking it, over a year ago. Recommended to me by bro-in-law who is a doctor. My doctor is fine with my taking it. Will continue to use it and have recommended it to others as well."