his literature review provides an in-depth analysis of non-alcoholic fatty liver disease (NAFLD), a common metabolic condition that affects a worldwide population. This review outlines the disease's scope, epidemiological trends, pathophysiology, non-invasive diagnostic criteria, and approaches. NAFLD presents as continuum of hepatic conditions ranging from mild steatosis to more serious illnesses such as non-alcoholic steatohepatitis (NASH), fibrosis, and cirrhosis. A combination of clinical examination, laboratory tests, and imaging methods are used to make a diagnosis, with a liver biopsy serving as the confirmed gold standard for both diagnosis and disease severity assessment. Because of the intricacy and multifaceted etiology of NAFLD, successful diagnosis, treatment, and prevention need a multidisciplinary approach. ​