Typical blood values such as bilirubin, gamma-GT (GGT), alkaline phosphatase (AP) and liver values such as ALT (GPT) and AST (GOT) are determined to assess bile function. An elevated bilirubin value can indicate bile stasis or gallstones, especially if itching or jaundice occur at the same time. The GGT and AP are often elevated if there is a blockage of the bile ducts or inflammation. An elevated cholesterol level can also be associated with biliary dysfunction. These laboratory values are important indicators for the early detection and targeted treatment of biliary problems.