L-Theanine is an amino acid commonly found in green tea. Each capsule contains 100 mg of L-Theanine. Inert ingredients are rice flour, gelatin and water. Do not confuse this with L-Threonine, a different substance.L-Theanine is a relaxant. The form of L-Theanine in this product is Suntheanine®. Suntheanine® is a registered trademark of Taiyo International, Inc.
Independent laboratory analsys has verified that some other products from green tea or chemical synthesis are not L-Theanine and have not been shown to be safe and effective. Other products contain D-Theanine as well as L-Theanine. D-Theanine has no published value.
According to the manufacturer:
Reprinted with permission of Life Extension.
"Theanine is an amino acid found in green tea that produces calming effects in the brain by increasing levels of serotonin and dopamine, and blocking the binding of L-glutamic acid to glutamate receptors.32 Life Extension Foundation members can enjoy the benefits of this unique ingredient in a 100 mg supplement—L-Theanine. A “feel good” supplement, theanine causes no adverse reactions. In fact, in Japan, theanine is added to soft drinks and chewing gum for the purpose of inducing relaxation.
The calming, mood-enhancing effect is achieved by helping to increase alpha-brain waves, electrical brain activity commonly present when you are very relaxed, literally putting you in a better mood.32
Just as meditation, massage, or aromatherapy quiets the mind and body, so too theanine plays a role in inducing the same calm and feeling of well-being—without drowsiness. It is a non-toxic, highly desirable mood modulator."
The manufacturer prohibits further discount of this product.