The present study aiming to evaluate the effect of synbiotic yogurt consumption on hepatic echogenisity, liver enzymes, lipid profile, glycemic status, blood pressure, body composition, oxidative stress markers, glucagon like peptide-2, and complement C1q/tumor necrosis factor-α related protein-5 in patients with non alcoholic fatty liver disease. This study is a parallel randomized controlled clinical trial. 102 Patients will be randomly allocated into three groups, including two intervention groups and the control group. Exclusion criteria includes alcohol use, viral hepatitis, hepatocellular carcinoma, other causes of chronic liver disease, diabetes mellitus, untreated hypothyroidism, psychiatric disorder, kidney disease, pregnancy and lactation. The intervention groups will consume 300 grams per day of synbiotic or conventional yogurt in addition to usual treatment and control group will receive usual treatment for 24 weeks. Dietary assessment, anthropometric measurements, blood pressure, physical activity questionnaire and fasting blood sampling will be done at the weeks 0, 8, 16 and 24 of the trial and the results will be analyzed.