Low Glycemic Index Dietary Intervention Program in Nonalcoholic Fatty Liver Disease

Inclusion Criteria: * Age 18 to 70 years * Fatty liver by proton-magnetic resonance spectroscopy, defined as hepatic triglyceride content 5% or above * Serum alanine aminotransferase (ALT) above 30 U/L in men and 19 U/L in women * Informed written consent obtained Exclusion Criteria: * Positive hepatitis B surface antigen, anti-hepatitis C virus antibody, or anti-nuclear antibody titer above 1/160 * Alcohol consumption above 30 g per week in men or 20 g per week in women * Alanine aminotransferase (ALT) above 10 times the upper limit of normal * Liver decompensation, as evidenced by bilirubin above 50 µmol/l, platelet count below 100 × 10e9/l, prothrombin time above 1.3 times the upper limit of normal, albumin below 35 g/l, presence of ascites or varices * Evidence of hepatocellular carcinoma * Terminal illness or cancer, unless in complete remission for more than 5 years