Skip to main page content
Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
Review
, 53 (6), 1299-311

Green Tea Catechins and Blood Pressure: A Systematic Review and Meta-Analysis of Randomised Controlled Trials

Affiliations
Review

Green Tea Catechins and Blood Pressure: A Systematic Review and Meta-Analysis of Randomised Controlled Trials

Saman Khalesi et al. Eur J Nutr.

Abstract

Purpose: Although previous literature has reported that regular green tea consumption may improve blood pressure, the evidence from these studies is not consistent. The present study systematically reviewed randomised controlled trials and examined the effect of green tea consumption on blood pressure using meta-analysis.

Methods: Search of ProQuest, PubMed, Scopus and Cochrane Library (CENTERAL) was conducted, to identify eligible articles. Articles from 1995 to 2013 were included. A random-effect model was chosen to calculate the effect of combined trials.

Result: Thirteen studies were included in the meta-analysis. Green tea consumption significantly changed systolic blood pressure, by -2.08 mm Hg (95% CI -3.06, -1.05), and diastolic blood pressure, by -1.71 mm Hg (95% CI -2.86, -0.56), compared to the control. Changes in lipid profile, blood glucose and body mass index were also assessed in the meta-analysis. A significant reduction was found in total cholesterol (-0.15 mmol/L [95% CI -0.27, -0.02]) and low-density lipoprotein cholesterol (-0.16 mmol/L [95% CI -0.22, -0.09]). Changes in other parameters did not reach statistical significance. Subgroup analysis suggested a greater reduction in both systolic and diastolic blood pressure in studies that included participants with a baseline mean systolic blood pressure of ≥ 130 mm Hg, and studies involving consuming green tea as an extract.

Conclusion: The present meta-analysis suggests that green tea and its catechins may improve blood pressure, and the effect may be greater in those with systolic blood pressure ≥ 130 mm Hg. The meta-analysis also suggests that green tea catechins may improve total and low-density lipoprotein cholesterol.

Similar articles

See all similar articles

Cited by 16 PubMed Central articles

See all "Cited by" articles

References

    1. J Am Diet Assoc. 2011 Nov;111(11):1720-9 - PubMed
    1. Physiol Behav. 2010 Apr 26;100(1):42-6 - PubMed
    1. Nutrition. 2011 Feb;27(2):206-13 - PubMed
    1. Hypertension. 2003 Dec;42(6):1206-52 - PubMed
    1. J Epidemiol Community Health. 1998 Jun;52(6):377-84 - PubMed

LinkOut - more resources

Feedback