the·​a·​nine | \ ˈthē-ə-ˌnēn How to pronounce theanine (audio) \
variants: or L-theanine \ ˈel-​ˈthē-​ə-​ˌnēn How to pronounce theanine (audio) \

Definition of theanine

: an amino acid C7H14N2O3 found especially in green tea and used as a dietary supplement Green tea, which is rich in a depression-fighting amino acid called theanine, has previously been lauded for its health benefits.— Camilla Turner

Examples of theanine in a Sentence

Recent Examples on the Web The new line features two gummies: the Energy provides a jitter-free buzz with L-theanine and green tea leaf extract, while the six milligrams of melatonin in the Sleep formula encourage sleep. Anna Haines, Forbes, 28 Oct. 2021 That’s the logic behind Zeno’s formula, as L-theanine is proven to enhance focus and calm. Benjamin Adams, Forbes, 10 Sep. 2021 Other herbal supplements like magnesium, valerian, melatonin, L-theanine, and jujube have all been found as aiding natural sleep in different ways. Ashley Levine, Rolling Stone, 30 Aug. 2021 There are different levels of L-theanine depending on which type of true tea is consumed. Sudiksha Kochi, USA TODAY, 19 June 2021 It is also known for having L-theanine, which can help reduce the risk of Alzheimer's or Parkinson's disease. Sudiksha Kochi, USA TODAY, 19 June 2021 Like Lightwave, Kin Spritz features L-theanine, an increasingly popular amino acid that is said to promote relaxation and improve cognitive performance. Chris Furnari, Forbes, 6 May 2021 Matcha is also loaded with l-theanine, an amino acid found in black tea, green tea, and mushrooms. Ola Faleti,, 17 Apr. 2021 Suntheanine is a form of L-theanine that helps promote relaxation without any drowsiness. Andrea Navarro, Travel + Leisure, 17 Mar. 2021

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'theanine.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of theanine

1950, in the meaning defined above

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The first known use of theanine was in 1950

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Statistics for theanine

Last Updated

7 Nov 2021

Cite this Entry

“Theanine.” Dictionary, Merriam-Webster, Accessed 27 Nov. 2021.

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