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Randomized Controlled Trial
. 2011 Feb;27(2):206-13.
doi: 10.1016/j.nut.2010.01.015. Epub 2010 Jun 2.

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

Arpita Basu  1 , Mei Du, Karah Sanchez, Misti J Leyva, Nancy M Betts, Steve Blevins, Mingyuan Wu, Christopher E Aston, Timothy J Lyons
Affiliations
Randomized Controlled Trial

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

Arpita Basu et al. Nutrition. 2011 Feb.

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.

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Conflict of interest statement

Conflicts of interest: None

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