Evaluation of the Effects of a Low Free Sugar Diet in Patients With Nonalcoholic Fatty Liver Disease

To study the effects of a low free sugar diet on lipid profile, glycemic indices, liver enzymes, inflammatory factors and hepatic steatosis and fibrosis in patients with Nonalcoholic fatty liver disease, 50 patients who referred to Gastrointestinal (GI) clinic with steatosis grade 2 and 3 will be randomly allocated to receive low free sugar diet or regular diet for 12 weeks; both groups will be advised to adherence the investigators' nutrition recommendation and exercise program too. At the first and the end of the intervention, lipid profiles, liver enzymes,glycemic indices, some inflammatory markers, and liver fibrosis will be assessed and compared between groups.