Effects of Green Tea Supplementation in Subjects With Metabolic Syndrome in Oklahoma
Abstract
Daily supplementation of decaffeinated green tea (4 cups/day) may be beneficial to humans diagnosed with the metabolic syndrome (MetS), as it may help decrease total body weight. Body weight and BMI decreased significantly (p<0.05) in green tea (-2.5 kg and -0.9, respectively) versus control (+0.6 kg and + 0.2 kg) at eight weeks. Although the supplement group did not reach significance, a similar weight loss trend was observed (-1.3 kg), which also decreased BMI (-0.4). When compared to controls, there were no significant differences in change at eight weeks for the green tea beverage or supplement group in fasting plasma glucose levels, lipid levels, body fat percentage, waist circumference, or blood pressure. However, a decrease in trend (p<0.1) of diastolic blood pressure at eight weeks for the green tea group (-4.7 mmHg) compared to placebo (+1.5 mmHg) was noted, and the same trend did not exist for the supplement group. An increase in trend (p<0.1) was observed for HDL cholesterol in green tea (+0.9 mg/dL) versus control (-1.4 mg/dL). A similar pattern was true for the supplement group (+0.6 mg/dL). At eight weeks, carbohydrate intake was significantly higher (p<0.05) for the green tea group (+67 g) versus control (-31 g). The supplement group exhibited a similar trend, (+24 g), suggesting possible carbohydrate malabsorption in both the green beverage and supplement groups. Thus, green tea beverage or supplements may be a beneficial tool to aid weight loss. Additional research, including longer study duration and larger sample size, is needed to confirm benefits such as a decrease in diastolic blood pressure and increase in HDL cholesterol with green tea flavonoid supplementation.
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- OSU Theses [15752]