Category Archives: L-theanine

Why Does the L-Theanine Content of Tea Vary?

Posted on January 13, 2020 by Robert Barrington

Tea is a unique source of an amino acid called L-theanine. L-theanine is of interest to nutritionists because evidence suggests that L-theanine can alter brain chemistry which result in changes to brain wave pattern. These changes cause the excitability of … Continue reading →

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L-Theanine: It’s Effects on Mental State

Posted on September 26, 2019 by Robert Barrington

L-theanine is an amino acid found in the tea plant (Camellia sinensis). When tea is brewed, L-theanine passes from the tea leaves into the water. Consuming tea therefore provides a source of L-theanine, and studies show that the L-theanine from … Continue reading →

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L-Theanine in Tea Leaves

Posted on June 9, 2019 by Robert Barrington
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L-Theanine: Important Brain Nutrient?

Posted on November 26, 2018 by Robert Barrington

The health effects of tea are well reported. Studies show that tea has a number of beneficial effects, including anti-cancer, cardiovascular and neuroprotective effects. The ability of tea to protect mental function, and perhaps even enhance it, is well reported, … Continue reading →

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L-Theanine and L-Cystine: Immune Defence

Posted on September 3, 2018 by Robert Barrington

L-theanine is a non-essential amino acid, the only known dietary source of significance being tea. L-cystine is a non-essential amino acid found in all protein foods. Both L-theanine and L-cystine have antioxidant effects in humans and animals. For cystine, this … Continue reading →

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What Is L-Theanine and Do You Need it?

Posted on August 17, 2018 by Robert Barrington

L-theanine is an amino acid found almost exclusively in tea (the Camellia sinensis plant). Chemically L-theanine is called 𝛾-glutamylethylamide. This amino acid does not form proteins like many other amino acids, but instead is found in its free-form. L-theanine is … Continue reading →

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L-Theanine for Calmness and Tranquility

Posted on April 9, 2018 by Robert Barrington

L-theanine is an amino acid found mainly in the leaves of the tea plant (Camelia sinensis). Both black and green tea are good sources of L-theanine. The dry weight of tea leaves is thought to be about 1-2 % L-theanine. … Continue reading →

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GABA Versus L-Theanine for Anxiety

Posted on February 12, 2018 by Robert Barrington
Posted in Anxiety, Depression, Gamma Aminobutryric Acid (GABA), L-theanine, Mood, Tea | Comments Off on GABA Versus L-Theanine for Anxiety

How Much L-theanine Is There In a Cup of Tea?

Posted on November 6, 2017 by Robert Barrington
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The Absorption and Brain Effects of L-Theanine

Posted on February 7, 2017 by Robert Barrington

L-theanine (𝛄-ethylamino-L-glutamic acid) is an amino acid found almost exclusively in the leaves of the tea plant (Camelia sinensis). L-theanine is thought to possess physiological activity in humans, and in particular may be able to affect the relaxation state of … Continue reading →

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