IDEAS home Printed from https://ideas.repec.org/a/plo/pone00/0103247.html
   My bibliography  Save this article

The Effect of Black Tea on Blood Pressure: A Systematic Review with Meta-Analysis of Randomized Controlled Trials

Author

Listed:
  • Arno Greyling
  • Rouyanne T Ras
  • Peter L Zock
  • Mario Lorenz
  • Maria T Hopman
  • Dick H J Thijssen
  • Richard Draijer

Abstract

Objective: Epidemiological evidence has linked consumption of black tea, produced from Camellia sinensis, with a reduced risk of cardiovascular diseases. However, intervention studies on the effects of tea consumption on blood pressure (BP) have reported inconsistent results. Our objective was to conduct a systematic literature review with meta-analysis of controlled human intervention studies examining the effect of tea consumption on BP. Methods: We systematically searched Medline, Biosis, Chemical Abstracts and EMBASE databases through July 2013. For inclusion, studies had to meet the following pre-defined criteria: 1) placebo controlled design in human adults, 2) minimum of 1 week black tea consumption as the sole intervention, 3) reported effects on systolic BP (SBP) or diastolic BP (DBP) or both. A random effects model was used to calculate the pooled overall effect of black tea on BP. Results: Eleven studies (12 intervention arms, 378 subjects, dose of 4–5 cups of tea) met our inclusion criteria. The pooled mean effect of regular tea ingestion was −1.8 mmHg (95% CI: −2.8, −0.7; P = 0.0013) for SBP and −1.3 mmHg (95% CI: −1.8, −0.8; P

Suggested Citation

  • Arno Greyling & Rouyanne T Ras & Peter L Zock & Mario Lorenz & Maria T Hopman & Dick H J Thijssen & Richard Draijer, 2014. "The Effect of Black Tea on Blood Pressure: A Systematic Review with Meta-Analysis of Randomized Controlled Trials," PLOS ONE, Public Library of Science, vol. 9(7), pages 1-9, July.
    • Handle: RePEc:plo:pone00:0103247
    DOI: 10.1371/journal.pone.0103247
    as

    Download full text from publisher

    File URL: https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0103247
    Download Restriction: no
    File URL: https://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0103247&type=printable
    Download Restriction: no
    File URL: https://libkey.io/10.1371/journal.pone.0103247?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    References listed on IDEAS

    as
    1. Rouyanne T Ras & Peter L Zock & Richard Draijer, 2011. "Tea Consumption Enhances Endothelial-Dependent Vasodilation; a Meta-Analysis," PLOS ONE, Public Library of Science, vol. 6(3), pages 1-9, March.
    Full references (including those not matched with items on IDEAS)

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Małgorzata Znyk & Kinga Polańska & Leokadia Bąk-Romaniszyn & Dorota Kaleta, 2020. "Correlates of Blood Pressure and Cholesterol Level Testing Among a Socially-Disadvantaged Population in Poland," IJERPH, MDPI, vol. 17(6), pages 1-15, March.

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Hadi Nobari & Saber Saedmocheshi & Linda H. Chung & Katsuhiko Suzuki & Marcos Maynar-Mariño & Jorge Pérez-Gómez, 2021. "An Overview on How Exercise with Green Tea Consumption Can Prevent the Production of Reactive Oxygen Species and Improve Sports Performance," IJERPH, MDPI, vol. 19(1), pages 1-14, December.

    More about this item

    Statistics

    Access and download statistics

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:plo:pone00:0103247. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: plosone (email available below). General contact details of provider: https://journals.plos.org/plosone/ .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.