Evidence map›Paper›PMID 38974590›Full record

ReviewPreventive nutrition and food science2024

Effect of Green Tea Supplementation on Inflammatory Markers among Patients with Metabolic Syndrome and Related Disorders: A Systematic Review and Meta-Analysis.

Fernanda Souza de Oliveira Assis, Gabriel Lima Vasconcellos, Diego José Pereira Lopes, Leandro Roberto de Macedo, Maísa Silva

Abstract readReview
In one paragraph

Review in Preventive nutrition and food science, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.

0numbers the graph read from it
0cells of the map it votes in
7citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from 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.

2 · The registry

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.

3 · Its place in the literature

Who cites it

7 citing papers in PubMed.

  1. Article
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors.

Fernanda Souza de Oliveira AssisDepartment of Basic Life Sciences, Universidade Federal de Juiz de Fora, Governador Valadares 35020-360, Brazil.ORCID https://orcid.org/0000-0003-1739-6198
Gabriel Lima VasconcellosDepartment of Medicine, Universidade Federal de Juiz de Fora, Campus Governador Valadares, Governador Valadares 35020-360, Brazil.ORCID https://orcid.org/0009-0009-4037-0245
Diego José Pereira LopesDepartment of Medicine, Universidade Federal de Juiz de Fora, Campus Governador Valadares, Governador Valadares 35020-360, Brazil.ORCID https://orcid.org/0000-0002-3827-5232
Leandro Roberto de MacedoDepartment of Economy, Universidade Federal de Juiz de Fora, Governador Valadares 35020-360, Brazil.ORCID https://orcid.org/0000-0001-6144-7947
Maísa SilvaDepartment of Basic Life Sciences, Universidade Federal de Juiz de Fora, Governador Valadares 35020-360, Brazil.ORCID https://orcid.org/0000-0003-3996-159X

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Several randomized controlled trials (RCTs) have investigated the potential benefits of green tea on the inflammatory process in metabolic syndrome (MetS). However, the results are inconclusive and inconsistent. In the present study, we performed a literature review and meta-analysis to evaluate the effect of green tea supplementation on inflammatory markers [e.g., tumor necrosis factor-α (TNF-α), C-reactive protein (CRP), and interleukin-6 (IL-6)] among patients with MetS and related disorders. We systematically searched for relevant publications up to March 2022 in the PubMed, Scopus, Web of Science, and SciELO databases. The review was registered with PROSPERO (CRD42022320345). Mean differences with 95% confidence intervals were pooled on the basis of the random effects model to compare the effects of green tea with placebo. We used meta-regression and subgroup analyses to determine the cause of heterogeneity and performed study quality assessment using the Grading of Recommendations Assessment, Development, and Evaluation method. We assessed publication bias using funnel plots and Egger's tests. Out of the total 15 RCTs that were included in this systematic review, 12 were chosen for the meta-analysis. The results revealed that green tea significantly decreased TNF-α levels but did not affect CRP and IL-6 levels. Subgroup analysis showed that green tea supplementation in studies lasting ≤8 weeks significantly increased CRP levels. Furthermore, meta-regression analysis demonstrated a significant association between increasing IL-6 concentration and treatment duration. According to our meta-analysis, green tea was shown to considerably lower circulating TNF-α levels. To confirm these findings, carefully planned trials are required.

Indexed as

green teainflammationmeta-analysismetabolic syndromerandomized controlled trial

Identifiers

PMID38974590
PMCPMC11223924

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Registered trials

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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.