Green tea minimally affects biomarkers of inflammation in obese subjects with metabolic syndrome

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#adult #antioxidants #biomarkers #c-reactive-protein #camellia-sinensis

Green tea minimally affects biomarkers of inflammation in obese subjects with metabolic syndrome

Basu et al., 2011 | Nutrition | Rct

Citation

Basu Arpita, Du Mei, ... Lyons Timothy J. Green tea minimally affects biomarkers of inflammation in obese subjects with metabolic syndrome. Nutrition. 2011-Feb;27(2):206-13. doi:10.1016/j.nut.2010.01.015

Abstract

OBJECTIVE: Green tea (Camellia sinensis) has shown to exert cardioprotective benefits in observational studies. The objective of this clinical trial was to assess the effects of green tea on features of metabolic syndrome and inflammation in obese subjects. METHODS: We conducted a randomized controlled trial in obese subjects with metabolic syndrome. Thirty-five subjects [(mean ± SE) age 42.5 ± 1.7 y, body mass index 36.1 ± 1.3 kg/m(2)] completed the 8-wk study and were randomly assigned to receive green tea (4 cups/d), green tea extract (2 capsules and 4 cups water/d), or no treatment (4 cups water/d). Both the beverage and extract groups had similar dosing of epigallocatechin-3-gallate, the active green tea polyphenol. Fasting blood samples were collected at screening, 4 and 8 wk of the study. RESULTS: Green tea beverage or extract supplementation did not significantly alter features of metabolic syndrome or biomarkers of inflammation including adiponectin, C-reactive protein, interleukin-6, interleukin-1β, soluble vascular cell adhesion molecule-1, soluble intercellular adhesion molecule-1, leptin, or leptin:adiponectin ratio. However, both green tea beverage and extracts significantly reduced plasma serum amyloid alpha versus no treatment (P < 0.005). CONCLUSION: This study suggests that the daily consumption of green tea beverage or extracts for 8 wk was well tolerated but did not affect the features of metabolic syndrome. However, green tea significantly reduced plasma serum amyloid alpha, an independent cardiovascular disease risk factor, in obese subjects with metabolic syndrome.

Key Findings

Green tea beverage or extract supplementation did not significantly alter features of metabolic syndrome or biomarkers of inflammation including adiponectin, C-reactive protein, interleukin-6, interleukin-1β, soluble vascular cell adhesion molecule-1, soluble intercellular adhesion molecule-1, leptin, or leptin:adiponectin ratio. However, both green tea beverage and extracts significantly reduced plasma serum amyloid alpha versus no treatment (P < 0.005).

Outcomes Measured

  • Requires manual extraction

Population

Field Value
Population metabolic syndrome
Sample Size See abstract
Age Range See abstract
Condition inflammation

MeSH Terms

  • Adult
  • Antioxidants
  • Biomarkers
  • C-Reactive Protein
  • Camellia sinensis
  • Cardiovascular Diseases
  • Catechin
  • Female
  • Humans
  • Inflammation
  • Intercellular Adhesion Molecule-1
  • Interleukin-1beta
  • Interleukin-6
  • Male
  • Metabolic Syndrome
  • Middle Aged
  • Obesity
  • Phytotherapy
  • Plant Extracts
  • Single-Blind Method
  • Tea
  • Vascular Cell Adhesion Molecule-1

Evidence Classification

  • Level: Rct
  • Publication Types: Journal Article, Randomized Controlled Trial, Research Support, N.I.H., Extramural, Research Support, Non-U.S. Gov't
  • Vertical: green-tea-metabolic

Provenance

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