SynthesisScientific reports2014
Effect of green tea consumption on blood pressure: a meta-analysis of 13 randomized controlled trials.
Synthesis in Scientific reports, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 43 papers, 5 of them syntheses that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
43 citing papers in PubMed, 5 syntheses or guidelines pooled it, 116 citations in OpenAlex.
- Safety classification of herbal medicine use among hypertensive patients: a systematic review and meta-analysis.Frontiers in pharmacology · 2024Pooled it
- The Role of Diet in the Prevention of Hypertension and Management of Blood Pressure: An Umbrella Review of Meta-Analyses of Interventional and Observational Studies.Advances in nutrition (Bethesda, Md.) · 2024Pooled it
- Effect of green tea supplementation on blood pressure: A systematic review and meta-analysis of randomized controlled trials.Medicine · 2020Pooled it
- Pooled it
- 7th Brazilian Guideline of Arterial Hypertension: Chapter 6 - Non-pharmacological treatmentArquivos brasileiros de cardiologia · 2016Guideline
- Enhanced Effects of Complex Tea Extract and the Postbiotic BPL1International journal of molecular sciences · 2026Article
- Multi-target neuroprotective mechanisms of epigallocatechin-3-gallate (EGCG) in stroke: from molecular pathways to nanomedicine delivery and clinical translation.Frontiers in pharmacology · 2026Review
- Tea consumption and cardiovascular risk and outcomes: mechanistic insights, epidemiological evidence, and clinical implications.Frontiers in cardiovascular medicine · 2026Review
- Green tea consumption and cerebral white matter lesions in community-dwelling older adults without dementia.NPJ science of food · 2025Article
- Association between healthy beverage index and healthy beverage score with metabolic syndrome: a cross-sectional study.Journal of nutritional science · 2025Article
- Acute change in resting energy expenditure and vital signs in response to white tea consumption in females: a pilot study.Nutrition & metabolism · 2024Article
- Cardiovascular Effects of Herbal Products and Their Interaction with Antihypertensive Drugs-Comprehensive Review.International journal of molecular sciences · 2024Review
- Effects of green tea and roasted green tea on human responses.Scientific reports · 2024Article
- Beverages - a scoping review for Nordic Nutrition Recommendations 2023.Food & nutrition research · 2024Article
- Bioactive molecules from terrestrial and seafood resources in hypertension treatment: focus on molecular mechanisms and targeted therapies.Natural products and bioprospecting · 2023Review
- Therapeutic Activity of Green Tea Epigallocatechin-3-Gallate on Metabolic Diseases and Non-Alcoholic Fatty Liver Diseases: The Current Updates.Nutrients · 2023Review
- Possible Side Effects of Polyphenols and Their Interactions with Medicines.Molecules (Basel, Switzerland) · 2023Review
- Oxidative Stress, Antioxidants and Hypertension.Antioxidants (Basel, Switzerland) · 2023Review
- Coffee and Green Tea Consumption and Cardiovascular Disease Mortality Among People With and Without Hypertension.Journal of the American Heart Association · 2023Article
- Supplementation with Two New Standardized Tea Extracts Prevents the Development of Hypertension in Mice with Metabolic Syndrome.Antioxidants (Basel, Switzerland) · 2022Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
7 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The studies investigating the effects of green tea on blood pressure (BP) have generated inconsistent results. The aim of this study is to quantitatively evaluate the effects of green tea on BP control. PubMed, Embase, and the Cochrane Library (updated to March 2014) were searched for randomized controlled trials evaluating the effects of green tea on BP. Pooled effect of green tea consumption on BP was evaluated using fixed-effects or random-effects model. Thirteen trials comprising a total of 1,367 subjects were included in the current meta-analysis. The overall outcome of the meta-analysis suggested that green tea consumption significantly decrease systolic blood pressure (SBP) level by -1.98 mmHg (95% CI: -2.94, -1.01 mmHg; P < 0.001). Compared with the control group, green tea also showed a significant lowering effect on diastolic blood pressure (DBP) in treatment group (-1.92 mmHg; 95% CI: -3.17, -0.68 mmHg; P = 0.002). Subgroup analyses further suggested that the positive effect of green tea polyphenols on BP was only showed in studies using a low-dose green tea polyphenol, with the long-term intervention duration or ruling out the confounding effects of caffeine. The meta-analysis suggested that green tea consumption had a favorable effect on decrease of BP.
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What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.