L-Theanine (5-N-ethylglutamine) is a unique free-form amino acid found in green tea. L-Theanine is the predominant amino acid in green tea and makes up 50% of the total free amino acids in the plant. L-Theanine is a relaxant that increases alpha-waves producing mental and physical relaxation decreasing stress and anxiety, without inducing drowsiness. L-Theanine is a building block for gamma amino butyric acid (GABA). GABA blocks the release of the neurotransmitters dopamine and serotonin, playing a key role in the relaxation effect.
L-Theanine is a feel good supplement with no known adverse reactions. It won’t make you drowsy or groggy. L-Theanine is considered to be safe based on its historical use as a part of tea. A heavy green tea drinker (6-8 cups a day) will consume between 200 to 400 mgs of L-Theanine daily.
One 200mg capsule of L-Theanine, or as needed depending on stress and anxiety levels, is the recommended dosage. L-Theanine can be taken with food or on an empty stomach. Some people open the capsule and add to their coffee or green tea. L-Theanine is neutral in taste and tends to take the bitterness out of coffee or green tea. L-Theanine may enhance the anti-tumor effects of some chemotherapy drugs. Use of L-Theanine with chemotherapy agents must be done under strict medical supervision.