The effect of green tea supplementation on obesity: A systematic review and dose-response meta-analysis of randomized controlled trials

source extracted confidence: high 2026-04-09
#adiposity #body-mass-index #body-weight #dietary-supplements #dose-response-relationship-drug

The effect of green tea supplementation on obesity: A systematic review and dose-response meta-analysis of randomized controlled trials

Lin et al., 2020 | Phytother Res | Meta Analysis

Citation

Lin Ying, Shi Dianfeng, ... Guimaraes Nathalia Sernizon. The effect of green tea supplementation on obesity: A systematic review and dose-response meta-analysis of randomized controlled trials. Phytother Res. 2020-Oct;34(10):2459-2470. doi:10.1002/ptr.6697

Abstract

The effects of green tea (GT) in obese subjects have been evaluated in different studies, but no consensus has been obtained due to the heterogeneity of the results. The dosage, the type of extract, and the duration of the intervention are the main contributors to the heterogeneity of the results. Therefore, the present systematic review and meta-analysis aimed to evaluate the efficacy and dose-response relationship of GT. Several databases were searched from inception to September 2019 to identify clinical trials that examined the influence of GT supplements on obesity indices in humans. Combined results using the random-effects model indicated that body weight (WMD: -1.78 kg, 95% CI: -2.80, -0.75, p = .001) and body mass index (BMI) (WMD: -0.65 kg/m2 , 95% CI: -1.04, -0.25, p = .001) did change significantly following GT administration. The reduction in waist circumference (WC) after GT consumption was significant in subjects in trials employing GT ≥800 mg/day (WMD: -2.06 cm) and with a treatment duration <12 weeks (WMD: -2.39 cm). Following the dose-response evaluation, GT intake did alter body weight, with a more important reduction when the GT dosage was <500 mg/day and the treatment duration was of 12 weeks. The results of present meta-analysis study support the use of GT for the improvement of obesity indices. Thus, we suggest that the use of GT can be combined with a balanced and healthy diet and regular physical exercise in the management of obese patients.

Key Findings

Thus, we suggest that the use of GT can be combined with a balanced and healthy diet and regular physical exercise in the management of obese patients.

Outcomes Measured

  • Requires manual extraction

Population

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

MeSH Terms

  • Adiposity
  • Body Mass Index
  • Body Weight
  • Dietary Supplements
  • Dose-Response Relationship, Drug
  • Female
  • Humans
  • Male
  • Obesity
  • Plant Extracts
  • Randomized Controlled Trials as Topic
  • Tea
  • Waist Circumference

Evidence Classification

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

Provenance

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