Liver function tests are among the most determined biochemical parameters, and it is essential that their interpretation is always performed correctly. The presence of liver disease is indicated not only by the well-known basic panel of liver function tests (bilirubin, ALT, AST, GGT and ALP), but also by other biochemical parameters, especially albumin, INR and platelet count. The latter analytes are often overlooked, as is the fact that normal values in the baseline liver test panel do not yet rule out advanced chronic liver disease - liver fibrosis or cirrhosis. In contrast, high levels of liver function tests do not automatically indicate liver failure. Considering the increasing incidence of liver disease as well as the rising mortality from liver causes in many European countries, it is desirable to update the diagnostic algorithm when pathological liver function tests are detected.