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SynonymsN-Ethyl-L-glutamine; L-Glutamic acid gamma-(ethylamide)
Molecular FormulaC7H14N2O3
Molecular Weight174.20
CAS Registry Number3081-61-6

What is L-Theanine?

Theanine is an amino acid (a building block for proteins) found in green tea.

People use theanine for treating anxiety and high blood pressure, for preventing Alzheimer’s disease, and for making cancerdrugs more effective.

How does it work? 

Theanine has a chemical structure very similar to glutamate, a naturally occurring amino acid in the body that helps transmit nerve impulses in the brain. Some of the effects of theanine appear to be similar to glutamate, and some effects seem to block glutamate.


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