Most common cause of non-alcoholic fatty liver disease?

NAFLD Most common chronic liver disease in many pas of the world Most commonly associated with metabolic syndrome (syndrome X). Other factors Drugs (amiodarone, tamoxifen,methotrexate) Alcohol Metabolic abnormalities (glycogen storage diseases, homocystinuria) Nutritional status (Obesity ,severe malnutrition, TPN) Celiac sprue and Wilson disease Reye's syndrome Acute fatty liver of pregnancy Biopsy : Macrovesicular steatosis without fibrosis