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What is theanine?

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Theanine is an amino acid, a building block for protein. It's naturally in tea leaves, especially green tea.

From: Theanine: Uses and Risks WebMD Medical Reference

SOURCES:

Fundukian, L.J., editor, , 3rd edition, 2009. The Gale Encyclopedia of Alternative Medicine

Memorial Sloan-Kettering Cancer Center web site: "About Herbs: Theanine."

Natural Medicines Comprehensive Database web site: "Theanine."

Rakel D. , 3rd edition, Saunders, 2012. Integrative Medicine

Natural Standard: "Theanine (L-theanine)."

Reviewed by Melinda Ratini on July 22, 2017

SOURCES:

Fundukian, L.J., editor, , 3rd edition, 2009. The Gale Encyclopedia of Alternative Medicine

Memorial Sloan-Kettering Cancer Center web site: "About Herbs: Theanine."

Natural Medicines Comprehensive Database web site: "Theanine."

Rakel D. , 3rd edition, Saunders, 2012. Integrative Medicine

Natural Standard: "Theanine (L-theanine)."

Reviewed by Melinda Ratini on July 22, 2017

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What are side effects of theanine?

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