Copyright © 2021 Natural Medicines (
March 2013

Green Tea and Coffee May Lower Stroke Risk

A new study reports that consumption of green tea and coffee may lower stroke risk.

Green tea is made from the leaves of an evergreen shrub native to Southeast Asia. Both green tea and black tea are made from the same plant species. Green tea is rich in the class of polyphenol compounds known as catechins. Polyphenols may have health benefits for humans.

In the recent study, 82,369 Japanese men and women without heart disease or cancer were followed for 13 years. Green tea and coffee intake was measured by a food frequency questionnaire.

During the study, 3,425 participants had a stroke and 910 participants developed heart disease. Drinking at least one cup of coffee daily lowered the stroke risk by 20 percent, compared to seldom coffee consumption. Additionally, drinking two to three cups of green tea daily significantly reduced the risk of stroke. Drinking four cups or more daily of green tea reduced the stroke risk even further.

Both coffee and green tea consumption were also linked to a lowered risk of heart disease.

For more information about green tea or coffee, please visit Natural Standard's Foods, Herbs & Supplements Database.


  1. Kokubo Y, Iso H, Saito I, et al. The Impact of Green Tea and Coffee Consumption on the Reduced Risk of Stroke Incidence in Japanese Population: The Japan Public Health Center-Based Study Cohort. Stroke. 2013 Mar 14. 
  2. Natural Standard: The Authority on Integrative Medicine. 

The information in this brief report is intended for informational purposes only, and is meant to help users better understand health concerns. This information should not be interpreted as specific medical advice. Users should consult with a qualified healthcare provider for specific questions regarding therapies, diagnosis and/or health conditions, prior to making therapeutic decisions. Copyright © 2021 Natural Medicines Inc. Commercial distribution or reproduction prohibited. Natural Medicines is the leading provider of high-quality, evidence-based, clinically-relevant information on natural medicine, dietary supplements, herbs, vitamins, minerals, functional foods, diets, complementary practices, CAM modalities, exercises and medical conditions. Monograph sections include interactions with herbs, drugs, foods and labs, contraindications, depletions, dosing, toxicology, adverse effects, pregnancy and lactation data, synonyms, safety and effectiveness.