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Scientific Name(s): Boletus badius., Camellia sinensis., Gamma-ethylamino-L-glutamic acid.
Common Name(s): L-theanine, Suntheanine
Learn about the potential benefits of L-Theanine including contraindications, adverse reactions, toxicology, pharmacology and historical usage.
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Drug Information:
L-theanine has been used for a variety of conditions including anxiety, cognitive impairment, to improve mental alertness, and boost immune function; however, limited clinical information is available to support these claims. Studies reporting an anxiolytic effect used single doses of theanine 200 to 250 mg. Short-term studies conducted for psychiatric disorders examined doses ranging from 240 to 400 mg per day in divided doses. Single-dose studies evaluating effects on cognitive performance and mental alertness combined caffeine with L-theanine doses of 97 to 100 mg. Learn more

L-theanine Side Effects

Editorial References and Review

Medically reviewed by BestRx Medical Team Last updated on 1/1/2020.

Source: Drugs.com L-theanine