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Effect of sour tea (Hibiscus sabdariffa L.) on arterial hypertension: a systematic review and meta-analysis of randomized controlled trials.

Abstract

BACKGROUND

Hibiscus sabdariffa L. is a tropical wild plant rich in organic acids, polyphenols, anthocyanins, polysaccharides, and volatile constituents that are beneficial for the cardiovascular system. Hibiscus sabdariffa beverages are commonly consumed to treat arterial hypertension, yet the evidence from randomized controlled trials (RCTs) has not been fully conclusive. Therefore, we aimed to assess the potential antihypertensive effects of H. sabdariffa through systematic review of literature and meta-analysis of available RCTs.

METHODS

The search included PUBMED, Cochrane Library, Scopus, and EMBASE (up to July 2014) to identify RCTs investigating the efficacy of H. sabdariffa supplementation on SBP and DBP values. Two independent reviewers extracted data on the study characteristics, methods, and outcomes. Quantitative data synthesis and meta-regression were performed using a fixed-effect model, and sensitivity analysis using leave-one-out method. Five RCTs (comprising seven treatment arms) were selected for the meta-analysis. In total, 390 participants were randomized, of whom 225 were allocated to the H. sabdariffa supplementation group and 165 to the control group in the selected studies.

RESULTS

Fixed-effect meta-regression indicated a significant effect of H. sabdariffa supplementation in lowering both SBP (weighed mean difference -7.58 mmHg, 95% confidence interval -9.69 to -5.46, P < 0.00001) and DBP (weighed mean difference -3.53 mmHg, 95% confidence interval -5.16 to -1.89, P < 0.0001). These effects were inversely associated with baseline BP values, and were robust in sensitivity analyses.

CONCLUSION

This meta-analysis of RCTs showed a significant effect of H. sabdariffa in lowering both SBP and DBP. Further well designed trials are necessary to validate these results.

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  • Authors+Show Affiliations

    ,

    aDepartment of Functional Sciences, Discipline of Pathophysiology, 'Victor Babes' University of Medicine and Pharmacy, Timisoara, Romania bBiotechnology Research Center, Mashhad University of Medical Sciences, Mashhad, Iran cMetabolic Research Centre, Royal Perth Hospital, School of Medicine and Pharmacology, University of Western Australia, Perth, Australia dDepartment of Functional Sciences, Discipline of Public Health eFaculty of Pharmacy, Discipline of Pharmaceutical Chemistry 'Victor Babes' University of Medicine and Pharmacy, Timisoara, Romania fDepartment of Hypertension, Chair of Nephrology and Hypertension, Medical University of Lodz, Poland *Drs Corina Serban and Amirhossein Sahebkar contributed equally to the writing of this article.

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    Source

    Journal of hypertension 33:6 2015 Jun pg 1119-27

    MeSH

    Antihypertensive Agents
    Arterial Pressure
    Female
    Hibiscus
    Humans
    Hypertension
    Male
    Phytotherapy
    Plant Extracts
    Randomized Controlled Trials as Topic

    Pub Type(s)

    Journal Article
    Meta-Analysis
    Review
    Systematic Review

    Language

    eng

    PubMed ID

    25875025

    Citation

    Serban, Corina, et al. "Effect of Sour Tea (Hibiscus Sabdariffa L.) On Arterial Hypertension: a Systematic Review and Meta-analysis of Randomized Controlled Trials." Journal of Hypertension, vol. 33, no. 6, 2015, pp. 1119-27.
    Serban C, Sahebkar A, Ursoniu S, et al. Effect of sour tea (Hibiscus sabdariffa L.) on arterial hypertension: a systematic review and meta-analysis of randomized controlled trials. J Hypertens. 2015;33(6):1119-27.
    Serban, C., Sahebkar, A., Ursoniu, S., Andrica, F., & Banach, M. (2015). Effect of sour tea (Hibiscus sabdariffa L.) on arterial hypertension: a systematic review and meta-analysis of randomized controlled trials. Journal of Hypertension, 33(6), pp. 1119-27. doi:10.1097/HJH.0000000000000585.
    Serban C, et al. Effect of Sour Tea (Hibiscus Sabdariffa L.) On Arterial Hypertension: a Systematic Review and Meta-analysis of Randomized Controlled Trials. J Hypertens. 2015;33(6):1119-27. PubMed PMID: 25875025.
    * Article titles in AMA citation format should be in sentence-case
    TY - JOUR T1 - Effect of sour tea (Hibiscus sabdariffa L.) on arterial hypertension: a systematic review and meta-analysis of randomized controlled trials. AU - Serban,Corina, AU - Sahebkar,Amirhossein, AU - Ursoniu,Sorin, AU - Andrica,Florina, AU - Banach,Maciej, PY - 2015/4/16/entrez PY - 2015/4/16/pubmed PY - 2016/4/7/medline SP - 1119 EP - 27 JF - Journal of hypertension JO - J. Hypertens. VL - 33 IS - 6 N2 - BACKGROUND: Hibiscus sabdariffa L. is a tropical wild plant rich in organic acids, polyphenols, anthocyanins, polysaccharides, and volatile constituents that are beneficial for the cardiovascular system. Hibiscus sabdariffa beverages are commonly consumed to treat arterial hypertension, yet the evidence from randomized controlled trials (RCTs) has not been fully conclusive. Therefore, we aimed to assess the potential antihypertensive effects of H. sabdariffa through systematic review of literature and meta-analysis of available RCTs. METHODS: The search included PUBMED, Cochrane Library, Scopus, and EMBASE (up to July 2014) to identify RCTs investigating the efficacy of H. sabdariffa supplementation on SBP and DBP values. Two independent reviewers extracted data on the study characteristics, methods, and outcomes. Quantitative data synthesis and meta-regression were performed using a fixed-effect model, and sensitivity analysis using leave-one-out method. Five RCTs (comprising seven treatment arms) were selected for the meta-analysis. In total, 390 participants were randomized, of whom 225 were allocated to the H. sabdariffa supplementation group and 165 to the control group in the selected studies. RESULTS: Fixed-effect meta-regression indicated a significant effect of H. sabdariffa supplementation in lowering both SBP (weighed mean difference -7.58 mmHg, 95% confidence interval -9.69 to -5.46, P < 0.00001) and DBP (weighed mean difference -3.53 mmHg, 95% confidence interval -5.16 to -1.89, P < 0.0001). These effects were inversely associated with baseline BP values, and were robust in sensitivity analyses. CONCLUSION: This meta-analysis of RCTs showed a significant effect of H. sabdariffa in lowering both SBP and DBP. Further well designed trials are necessary to validate these results. SN - 1473-5598 UR - https://www.unboundmedicine.com/medline/citation/25875025/full_citation L2 - http://Insights.ovid.com/pubmed?pmid=25875025 DB - PRIME DP - Unbound Medicine ER -