The medical specialty of hepatology focuses on the diagnosis, treatment, and prevention of liver diseases. Numerous factors can lead to liver disease. Interestingly, alcohol is the most frequent cause. Non Alcoholic Fatty Liver Disease (NAFLD), a lifestyle liver disease, is becoming more and more of an issue. Liver damage can be caused by iron overload, copper metabolic defects, some viruses (including hepatitis B and hepatitis C) that lay dormant in the liver for two to three decades, and a host of other hereditary problems.