Study aim: Objective: evaluating the effect of total anthocyanin base standardized (cornus mas L.) fruit extract on liver function, tumor necrosis factor α, malondealdehyde and adiponectin in patients with non-alcoholic fatty liver (NAFLD). Design: Patients are randomly assigned into 2 groups (n=40 in each group) using a software to receive total anthocyanin base standardized (cornus mas L.) fruit extract (equal to 320 mg/d anthocyanins) or placebo daily for 12 weeks. Settings and conduct: In a randomized double-blind clinical trial, 80 patients with NAFLD will be recruited from Diabetes Research Center, Shahid Sadoughi university of medical sciences, Yazd. The subjects are randomly divided into two groups to take total anthocyanin base standardized (cornus mas L.) fruit extract or placebo. Participants/Inclusion and exclusion criteria: Study population: patients with NAFLD (n=80). Inclusion criteria: ALT levels more than 30 U / L in men and more than 19 U / L in women, age 25-26 years, the patients with grade 1, 2 and 3 fatty liver, the consent of subject to participate in the study, the patients are from Yazd. Exclusion criteria: The history of diseases including cirrhosis, viral hepatitis, cardiovascular disease, diabetes, Wilson and cancer; Consumption of medications including corticosteroids, nonsteroidal anti-inflammatory drugs, hypoglycemic agents, tamoxifen, sodium valproate, methotrexate, probiotics, any medicine or supplement that affect liver function, supplements with antioxidant and anti-inflammatory properties; Following a special diet; Pregnancy and breastfeeding; Alcohol consumption. Intervention groups: Intervention group with total anthocyanin base standardized (cornus mas L.) fruit extract or placebo group. Main outcome variables: Liver function (liver enzymes and cytokeratin-18 levels, liver steatosis and fibrosis); tumor necrosis factor α, malondealdehyde and adiponectin levels.