Green tea promotes weight loss in women with polycystic ovary syndrome: Systematic review and meta-analysis

source extracted confidence: high 2026-04-09
#female #humans #insulin-resistance #polycystic-ovary-syndrome #randomized-controlled-trials-as-topic

Green tea promotes weight loss in women with polycystic ovary syndrome: Systematic review and meta-analysis

Colonetti et al., 2022 | Nutr Res | Meta Analysis

Citation

Colonetti Laura, Grande Antonio José, ... Colonetti Tamy. Green tea promotes weight loss in women with polycystic ovary syndrome: Systematic review and meta-analysis. Nutr Res. 2022-Aug;104:1-9. doi:10.1016/j.nutres.2022.03.009

Abstract

Among the main consequences of polycystic ovary syndrome (PCOS) are menstrual dysfunction, infertility, hyperandrogenism, insulin resistance, and weight gain; in aggravated cases, it can become a risk factor for the development of metabolic syndrome and cardiovascular disease. We hypothesized that green tea can be an option to complement the treatment of PCOS. Thus, this systematic review aims to evaluate the effects of green tea supplementation in women with PCOS. We searched for randomized controlled trials (RCTs) that evaluated women with PCOS who received green tea compared with placebo in electronic databases: MEDLINE via PubMed, EMBASE via Elsevier, Cochrane Library, LILACS via BVS, and Web of Science using the terms: "polycystic ovary syndrome," "green tea," "Camellia sinensis," "epigallocatechin gallate." The outcomes listed in the study protocol were body weight, fasting insulin, body mass index, body fat percentage, daily caloric intake, waist circumference, hip circumference, and waist/hip ratio. Four double-blind RCTs were included, with a total of 169 women: 85 in the green tea group and 84 in the placebo group. We found a significantly lower body weight (kg) for green tea group (mean difference, -2.80; 95% confidence interval, -5.25 to -0.35; P = .03; I² = 0%; 4 studies, 169 participants, very low-quality evidence). Green tea has potential positive effects for the reduction of weight, and future studies will be needed to confirm the estimated effect size; we reasonably expect this to be an option of adjuvant treatment in PCOS clinical management. Registration number: CRD42021226296.

Key Findings

Registration number: CRD42021226296.

Outcomes Measured

  • Requires manual extraction

Population

Field Value
Population See abstract
Sample Size 169
Age Range See abstract
Condition See abstract

MeSH Terms

  • Female
  • Humans
  • Insulin Resistance
  • Polycystic Ovary Syndrome
  • Randomized Controlled Trials as Topic
  • Tea
  • Waist Circumference
  • Weight Loss

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