Non-alcoholic fatty liver disease (NAFLD) is the most common liver disease in the Western world. In distinction to alcoholic fatty liver disease, alcohol consumption in NAFLD should be at a generally safe level, i.e., <20 grams/day in women and <30 grams/day in men. With the increasing prevalence of obesity and associated diseases such as type 2 diabetes mellitus, dyslipidemia, hypertension, and obstructive sleep apnea, the prevalence of NAFLD has also increased significantly in recent years.