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Tea's combination of caffeine and L-theanine can give you a calm yet alert mental state that could help boost productivity and effectiveness,” Ingram explains, citing a 2021 study on caffeine ...
L-theanine. An amino acid in tea leaves, L-theanine reduces anxiety and promotes relaxation without sedation. Keep in mind that each of these has pros and cons, and more research is needed to ...
“Research suggests that L-theanine may help support stress management, sleep and potentially weight management,” says Colleen Tewksbury, PhD, RD, LDN, national spokesperson for the American ...
The name theanine usually refers to the enantiomer L-theanine, which is the form found in tea leaves from which it is extracted as a powder. [4] [6] The right-handed enantiomer, D-theanine, is less-studied. Theanine is sold as a dietary supplement and is considered to be safe at doses up to 250 milligrams (mg) by the US Food and Drug ...
A 2020 review concluded that L-theanine supplementation of 200–400 milligrams per day may reduce stress and anxiety in people with acute stress, but there was insufficient evidence for the use of L-theanine as a prescription drug to treat stress and anxiety. Kimen8 20:48, 29 March 2024 (UTC)
Alpha-GPC – L-alpha glycerylphosphorylcholine has been studied only in the context of cognitive performance alongside other substances such as caffeine. [34] Choline bitartrate – Choline bitartrate is a tartaric acid salt containing choline (41% choline by molecular weight). One meta-analysis found choline bitartrate to be ineffective at ...
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