Fatty liver and viral hepatitis both affect the liver, but they are not the same disease. While fatty liver is mainly linked to lifestyle and metabolic problems, viral hepatitis is caused by infections. Fatty liver, also known as Non-Alcoholic Fatty Liver Disease (NAFLD), develops when excess fat builds up in the liver cells. Viral hepatitis is caused by hepatitis viruses, most commonly Hepatitis A, B, C and E.According to Dr Gupta:* Hepatitis A and E usually spread through contaminated food and water. * A family member has Hepatitis B or Hepatitis C.Early Detection Can Protect Your LiverDr Gupta says both fatty liver and viral hepatitis can be managed effectively if diagnosed early.