Theanines

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Theanine is a unique nutrient found in the leaves of green tea (Camellia sinensis).

Through the natural production of polyphenols, the tea plant converts theanine into catechins. This means that tea leaves harvested during one part of the growing season maybe high in catechins (and antioxidant benefits), while leaves harvested during another time of year may be higher in theanine.

Theanine acts as a non-sedating relaxant to help increase the brain’s production of alpha-waves which are associated with “relaxed alertness”. By increasing the brain’s output of alpha waves, theanine is thought to control anxiety, increase mental focus, improve concentration, and promote creativity. Three to four cups of green tea are expected tocontain 100-200 mg of theanine.

Theanines - Found in:

Tea, Matcha Tea,
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References 
1. Kakuda T, Nozawa A, Unno T, Okamura N, Okai O. Inhibiting effects oftheanine on caffeine stimulation evaluated by EEG in the rat. Biosci BiotechnolBiochem. 2000 Feb;64(2):287-93. 2. Kakuda T, Yanase H, Utsunomiya K,Nozawa A, Unno T, Kataoka K. Protective effect of gamma-glutamylethylamide(theanine) on ischemic delayed neuronal death in gerbils. Neurosci Lett. 2000Aug 11;289(3):189-92. 3. Sadzuka Y, Sugiyama T, Hirota S. Modulation ofcancer chemotherapy by green tea. Clin Cancer Res. 1998 Jan;4(1):153-6. 4.Sadzuka Y, Sugiyama T, Miyagishima A, Nozawa Y, Hirota S. The effects oftheanine, as a novel biochemical modulator, on the antitumor activity ofadriamycin. Cancer Lett. 1996 Aug 2;105(2):203-9. 5. Sadzuka Y, Sugiyama T,Sonobe T. Efficacies of tea components on doxorubicin induced antitumoractivity and reversal of multidrug resistance. Toxicol Lett. 2000 Apr 3;114(1-3):155-62. 6. Sadzuka Y, Sugiyama T, Sonobe T. Improvement of idarubicin--------------------------------------------------------------------------------Page 3 induced antitumor activity and bone marrow suppression by theanine, acomponent of tea. Cancer Lett. 2000 Oct 1;158(2):119-24. 7. Sadzuka Y,Sugiyama T, Suzuki T, Sonobe T. Enhancement of the activity of doxorubicin byinhibition of glutamate transporter. Toxicol Lett. 2001 Sep 15;123(2-3):159-67. 8.Sadzuka Y, Yamashita Y, Sugiyama T, Sonobe T. Effect of dihydrokainate on theantitumor activity of doxorubicin. Cancer Lett. 2002 May 28;179(2):157-63. 9.Sugiyama T, Sadzuka Y, Tanaka K, Sonobe T. Inhibition of glutamate transporterby theanine enhances the therapeutic efficacy of doxorubicin. Toxicol Lett. 2001Apr 30;121(2):89-96. 10. Sugiyama T, Sadzuka Y. Combination of theanine withdoxorubicin inhibits hepatic metastasis of M5076 ovarian sarcoma. Clin CancerRes. 1999 Feb;5(2):413-6. 11. Sugiyama T, Sadzuka Y. Enhancing effects ofgreen tea components on the antitumor activity of adriamycin against M5076ovarian sarcoma. Cancer Lett. 1998 Nov 13;1

About The Author

Kelley Herring, founder of Healing Gourmet, is a natural nutrition enthusiast with a background in biochemistry. Her passion is educating on how foods promote health and protect against disease and creating simple and delicious recipes for vibrant health and enjoyment.

Kelley Herring – who has written posts on Healing Gourmet.


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