Non-alcoholic fatty liver disease (NAFLD) is a metabolic disorder with high prevalence in patients suffering from chronic liver diseases [1]. NAFLD is characterized by the accumulation of > 5% of fat deposits in hepatocytes (hepatic steatosis) with no known other reasons for steatosis as excessive alcohol intake.The global prevalence of NAFLD differs depending on the population reaching 13% in Africa, 32% in the Middle East, and 30 % in the United States

Inclusion Criteria:

• Either male or female adult patients (>19 years) with fatty liver diagnosis by using upper abdominal ultrasound echography (US) and with type II diabetes diagnosed according to American Diabetes Association (ADA) 2019 criteria and treated with metformin

Exclusion Criteria:

• pregnant and/or lactating women, excessive alcohol use (defined as an average alcohol intake of> 30 g per day in men and > 20 g per day in women),
• Other etiology of chronic liver diseases such as viral hepatitis, drug-induced hepatitis, autoimmune hepatitis, patients suffering from chronic kidney disease, and hyper/hypoparathyroidism.
• Hypersensitivity to cholecalciferol, hypercalcemia, patients taking supplementation with vitamin D, and calcium.
• Medications affecting calcium/vitamin D metabolism (as anticonvulsants, glucocorticoids, and antacids).

double-blinded