Abstract
The present study (NCT01446276, ClinicalTrials.gov) assessed long-term effects of high-dose Resveratrol (RSV) on basal and insulin-mediated very low-density lipoprotein triglyceride (VLDL-TG), palmitate and glucose kinetics, and liver fat content in men with nonalcoholic fatty liver disease (NAFLD). Participants (n = 16) were non-diabetic, upper-body obese (BMI > 28 kg/m2 , WHR > 0.9) men with NAFLD who were randomized (1:1) in a double-blinded, placebo-controlled clinical trial to either RSV or placebo (500 mg 3 times daily) for 6 months. Magnetic resonance (MR) spectroscopy, dual-X-ray absorptiometry and MR imaging assessed liver fat content and body composition, respectively. 14 C-labeled VLDL-TG and 3 H-labeled glucose and palmitate tracers, in combination with indirect calorimetry and breath samples, were used to assess kinetics and substrate oxidations during basal and hyperinsulinaemic euglycaemic clamp conditions. RSV did not improve either basal or insulin-mediated VLDL-TG secretion, oxidation or clearance rates, nor did it affect palmitate or glucose turnover. Likewise, no changes in body composition or liver fat content occurred following RSV compared with placebo treatment. Therefore, RSV cannot be recommended for treatment of metabolic abnormalities in NAFLD.
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