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Why do people take guarana?

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Researchers once believed that the active ingredient of guarana was a chemical specific to the plant -- guaranine. But they later discovered that it was just caffeine. Guarana has among the highest concentrations of caffeine in any plant. It may contain up to 3.6% to 5.8% caffeine by weight. Coffee only has up to 2%.

From: Guarana WebMD Medical Reference

SOURCES:  Memorial Sloan-Kettering Cancer Center web site: “About Herbs: Guarana.” Natural Medicines Comprehensive Database web site: “Guarana.” Natural Standard Patient Monograph: “Guarana.” Duke, J. CRC Press, 1985. Cannon, M. 2001.
CRC Handbook of Medicinal Herbs, The Medical Journal of Australia,



Reviewed by Carmen Patrick Mohan on May 11, 2017

SOURCES:  Memorial Sloan-Kettering Cancer Center web site: “About Herbs: Guarana.” Natural Medicines Comprehensive Database web site: “Guarana.” Natural Standard Patient Monograph: “Guarana.” Duke, J. CRC Press, 1985. Cannon, M. 2001.
CRC Handbook of Medicinal Herbs, The Medical Journal of Australia,



Reviewed by Carmen Patrick Mohan on May 11, 2017

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What does the research say about guarana?

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