Obesity is associated with non-alcoholic fatty liver disease (NAFLD) and steatohepatitis (NASH) and recently, low-grade inflammation has been hypothesized to be the causative link. From animal studies, it is known that the compound resveratrol (RES) has strong anti-inflammatory and antioxidant effects and perhaps the potential to neutralize obesity-induced diseases. RES is already widely used as a food supplement though the precise effects are unknown. This project focuses on the effect of RES on fatty liver disease. In a double-blind controlled clinical trial, the researchers investigate the effects of RES 500 mg or placebo treatment x 3 daily for 6 months on NAFLD/NASH in 48 obese patients in a double-blind, randomised, controlled clinical trial. The researchers hypothesize that RES improves the ALT levels and reduces liver fat and inflammation assessed by MR spectroscopy and histological evaluation.