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Green tea minimally affects biomarkers of inflammation in obese subjects with metabolic syndrome.
Nutrition. 2010 Jun 1.
Basu A, et al
Nutritional Sciences, Oklahoma State University, Stillwater, Oklahoma, USA.
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-1beta, 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.
More on effects of natural tea and tea ingredients on weight control and weight loss
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Green tea and cancer prevention.
Nutr Cancer. 2010 Oct;62(7):931-7.
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