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Nγ-Ethyl-L-glutamine, L-Glutamic acid γ-(ethylamide),Suntheanine


L Theanine

L-Theanine Properties

White Crystalline Solid


cognitive enhancer


A non-protein amino acid mainly found naturally in the green tea plant. It may have activity in modulating the metabolism of cancer chemotherapeutics agents


ChEBI: A N5-alkylglutamine where the alkyl group is ethyl. It has been isolated from green tea.

Biological Activity

Amino acid analog of glutamine and component of green tea. Shown to bind to AMPA, Kainate, NMDA and group I mGlu receptors. Displays neuroprotective effects in vivo . Promotes self-renewal of human embryonic stem cells (hESC).

Biochem/physiol Actions

L-Theanine modulates the activity of several antitumor drugs and has been reported to stimulate self-renewal of human embryonic stem cells. L-Theanine binds to AMPA, Kainate, NMDA, and group I mGlu receptors.

Theanine is able to bind to AMPA, kainite, and NMDA glycine receptors in rat cortical neurons but with less affinity than glutamic acid. It has been studied as a glutamate transport inhibitor, preventing glutamate uptake by M5076 ovarian sarcoma-bearing mouse cells and increasing the effect on tumor growth in M5076 mice.

General description

L-Theanine is an analog of glutamine and a component of green tea.

Other Notes

Theanine is an amino acid analog of glutamine, found in green tea.


100, 500 mg in poly bottle

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