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Background : Individually, green tea and green coffee have been extensively studied for mitigation of metabolic syndrome (MS) in both rats and humans; however, their combined effect requires further investigation. Thus, we compared the metabolic effect of combining green tea and decaffeinated light roasted green coffee on MS in rats.    Methods:  An MS animal model was constructed by feeding Sprague-Dawley rats with a high-fat-high-sucrose (HFHS) diet for eight weeks and a low dose of streptozotocin (STZ) injection at week 2. Rats fed with HFHS diets and injected with STZ successfully developed MS phenotypes, indicated by higher body weight, systolic blood pressure, plasma triglyceride level, plasma fasting blood glucose level, and lower plasma HDL-C level, compared to those fed with a normal chow diet. Subsequently, MS rats were continuously fed with HFHS and divided into four groups: MS rats, MS with 300 mg/bw.t green tea extract (GT), MS with 200 mg/bw.t green coffee extract (GC), and MS with combined green tea and green coffee extract (CM) for nine weeks.    Results:  Combining green tea and green coffee have synergistic effects on reducing plasma fasting blood glucose and triglyceride level. Inflammatory markers both in plasma and liver tissue robustly decreased in CM group rats. However, the reduction of systolic blood pressure was observed only in GT and CM groups. Moreover, all treatment resulted in an increase in plasma HDL-C level in MS rats.    Conclusions : Our data highlighted that, in MS animal models, combined green tea and decaffeinated light roasted green coffee augment their several individual beneficial effects of improved metabolic parameters and modulated inflammatory genes.

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Decaffeinated light-roasted green coffee and green tea extract combination improved metabolic parameters and modulated inflammatory genes in metabolic syndrome rats