Effects of green tea supplementation on obesity indices and adipokines in adults: a grade-assessed systematic review and dose-response meta-analysis of randomised controlled trials

source extracted confidence: high 2026-04-09
#humans #tea #obesity #dietary-supplements #randomized-controlled-trials-as-topic

Effects of green tea supplementation on obesity indices and adipokines in adults: a grade-assessed systematic review and dose-response meta-analysis of randomised controlled trials

Dehzad et al., 2025 | Int J Food Sci Nutr | Meta Analysis

Citation

Dehzad Mohammad Jafar, Ghalandari Hamid, ... Askarpour Moein. Effects of green tea supplementation on obesity indices and adipokines in adults: a grade-assessed systematic review and dose-response meta-analysis of randomised controlled trials. Int J Food Sci Nutr. 2025-Jun;76(4):340-369. doi:10.1080/09637486.2025.2496400

Abstract

BACKGROUND: In this systematic review and meta-analysis, the impact of green tea supplementation on measurement/indices of adiposity was investigated. METHODS: Using predefined keywords, online databases (PubMed, Scopus, Web of Science Core Collection, and Google Scholar) were searched for relevant studies, published from inception up to February 2024. Data were extracted and registered. Subgroup analyses and the investigation of linear and non-linear associations were carried out. RESULTS: Green tea supplementation reduced BW (WMD: -0.74 kg; 95% CI: -0.97, -0.51), BMI (WMD: -0.29 kg/m2; 95% CI: -0.38, -0.19), WC (WMD: -1.04 cm; 95% CI: -1.55, -0.53), BFP (WMD: -0.65%; 95% CI: -1.03, -0.27), and leptin (WMD: -0.92 ng/ml; 95% CI: -1.71, -0.14), but did not change adiponectin levels (WMD: 0.20 µg/ml; 95% CI: -0.17, 0.57). CONCLUSION: Supplementation with green tea seems to be effective in reducing excess adiposity.

Key Findings

Green tea supplementation reduced BW (WMD: -0.74 kg; 95% CI: -0.97, -0.51), BMI (WMD: -0.29 kg/m2; 95% CI: -0.38, -0.19), WC (WMD: -1.04 cm; 95% CI: -1.55, -0.53), BFP (WMD: -0.65%; 95% CI: -1.03, -0.27), and leptin (WMD: -0.92 ng/ml; 95% CI: -1.71, -0.14), but did not change adiponectin levels (WMD: 0.20 µg/ml; 95% CI: -0.17, 0.57).

Outcomes Measured

  • Requires manual extraction

Population

Field Value
Population See abstract
Sample Size See abstract
Age Range See abstract
Condition See abstract

MeSH Terms

  • Humans
  • Tea
  • Obesity
  • Dietary Supplements
  • Randomized Controlled Trials as Topic
  • Adipokines
  • Adult
  • Adiposity
  • Body Mass Index
  • Female

Evidence Classification

  • Level: Meta Analysis
  • Publication Types: Journal Article, Systematic Review, Meta-Analysis
  • Vertical: green-tea

Provenance

Source extracted via PubMed E-utilities API on 2026-04-09