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J Herbmed Pharmacol. 2024;13(1): 1-9.
doi: 10.34172/jhp.2024.44838
  Abstract View: 208
  PDF Download: 163

Review

Relationship between green or black tea consumption and cerebral stroke: A systematic review and meta-analysis

Moloud Fakhri 1 ORCID logo, Tayebe Jamshidbeigi 2 ORCID logo, Ayda Hasanpour Dehkordi 3 ORCID logo, Mohsen Abdan 4 ORCID logo, Sam Mirfendereski 5* ORCID logo, Diana Sarokhani 4* ORCID logo

1 Traditional and Complementary Medicine Research Center, Addiction Institute, Mazandaran University of Medical Sciences, Sari, Iran
2 Department of Internal Medicine, Ilam University of Medical Sciences, Ilam, Iran
3 Department of Psychiatric, College of Medical Sciences, Khomein Branch, Islamic Azad University, Khomein, Iran
4 Research Center for Environmental Determinants of Health, School of Public Health, Kermanshah University of Medical Sciences, Kermanshah, Iran
5 Department of Radiology, Isfahan University of Medical Sciences, Isfahan, Iran
*Corresponding Authors: Email: Mirfendereski@med.mui.ac.ir; *Corresponding author:, Email: diana_sarokhani@yahoo.com

Abstract

After water, tea is the most popular drink in the world, and its relationship with heart diseases, stroke, and cancer has been always considered by researchers. The aim of the present study is to assess the relationship between green tea or black tea consumption and stroke risk using systematic review and meta-analysis methods. To assess the required resources, PubMed, Scopus, Web of science, Cochrane electronic databases, and the Google Scholar search engine were searched. To assess the study heterogeneity, I2 indexes was used. Data were analyzed using STATA 14 software. P<0.05 was considered to be statistically significant. The preventive effect of green tea on cerebral stroke in the case-control studies was more than cohort studies and higher in women than men. Its effect was also lower in people who consume green tea more than 10 years in comparison to people who consume it less than 10 years. Green tea effect was higher in those who consume more than 5 cups/day than those with less than 5 cups/day. The effect of black tea consumption in men and in those who drank less than 5 cups a day or those who drink black tea for 10 years or more was estimated in preventive cohort studies. Green tea has a significant preventive effect on the risk of stroke in different doses and periods of consumption; however, black tea is preventive in a dose of fewer than 5 cups per day and for a period of more than 10 years.

Implication for health policy/practice/research/medical education:

Green tea consumption prevents cerebral stroke. The higher the dosage and duration of black and green tea consumption, the greater the effects of drinking these two types of tea on preventing stroke.

Please cite this paper as: Fakhri M, Jamshidbeigi T, Hasanpour Dehkordi A, Abdan M, Mirfendereski S, Sarokhani D. Relationship between green or black tea consumption and cerebral stroke: A systematic review and meta-analysis. J Herbmed Pharmacol. 2024;13(1):1-9. doi: 10.34172/jhp.2024.44838.

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Submitted: 30 Jan 2023
Accepted: 03 May 2023
ePublished: 01 Jan 2024
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