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# Breaking news: Green tea extract fights obesity, high blood pressure, diabetes, heart disease
- URL: https://www.foodconsumer.org/green_tea_extract_diabetes_heart_disease_0627120631/
- Published: 2012-06-27T07:29:00.000Z
- Updated: 2026-09-22T15:46:27.000Z
- Description: In a three-month randomized, double-blind trial of 56 obese, hypertensive adults, 379 mg of green tea extract a day lowered systolic and diastolic blood pressure, fasting glucose, insulin resistance, LDL, triglycerides and inflammatory markers, and raised HDL.
- Author: Food Consumer
- Tags: Supplements, Nutrition, #vivvo-import

By David Liu, PHD

Wednesday June 27, 2012 (foodconsumer.org) -- Taking green tea extract supplements for a few months can help people with obesity related high blood pressure prevent diabetes and heart disease, according to a trial published online June 22, 2012 in Nutrition Research.

The randomized, double-blind, placebo-controlled trial was intended to determine how taking 379 mg of green tea extract daily for a period of three months would affect the risk of diabetes and heart disease in 56 obese and hypertensive subjects.

Both at the baseline and at the end of the three-month trial, researchers measured anthropometric parameters, blood pressure, levels of plasma lipids, blood glucose, creatinine, tumor necrosis factor α, C-reactive protein, insulin, and total antioxidant capacity.

At the end of the trial, Pawel Bogdanski of Poznan University of Medical Sciences, Poznan, Poland and colleagues, authors of the trial, found both systolic and diastolic blood pressure significantly lower in those who took the green tea extract supplement, compared to those who took a placebo. 

The researchers also found taking green tea extract supplement significantly increased high density lipoprotein cholesterol and decreased levels of fasting serum glucose, insulin, insulin resistance, serum tumor necrosis factor α, C-reactive protein, total and low-density lipoprotein cholesterol, and triglycerides.

Green tea (GT) consumption has been associated in observational studies with reduced risk of cardiovascular disease or heart disease and stroke, and metabolic syndrome which is related to high blood pressure, diabetes and obesity.

The current trial confirmed the findings from epidemiological studies that drinking green tea or taking green extract capsule can help people with obesity and or high blood pressure prevent diabetes and heart disease by influencing blood pressure, insulin resistance, inflammation and oxidative stress, and lipid profile in the patients.