Liver Function Tests Also called: Hepatic function panel, Liver panel, Liver tests Summary Your liver helps your body digest food, store energy, and remove poisons. Liver function tests are blood tests that check to see how well your liver is working. They check for liver damage, and can help diagnose liver diseases such as hepatitis and cirrhosis. You may have liver function tests as part of a regular checkup. Or you may have them if you have symptoms of liver disease. Doctors also use the tests to monitor some liver diseases, treatments, and possible side effects of medicines. Liver function tests measure certain proteins, enzymes, and substances, including: Albumin, a protein that the liver makes Total protein (TP) Enzymes that are found in the liver, including alanine transaminase (ALT), aspartate transaminase (AST), alkaline phosphatase (ALP), and gamma-glutamyl transpeptidase (GGT) Bilirubin, a yellow substance that is part of bile. It is formed when your red blood cells break down. Too much bilirubin in the blood can cause jaundice. There is also a urine test for bilirubin. Prothrombin time, which measures how long it takes for your blood to clot. Prothrombin is made by the liver. Array Alanine transaminase (ALT) blood test Albumin – blood (serum) test ALP – blood test Alpha-1 antitrypsin test Aspartate aminotransferase (AST) blood test Bilirubin – blood Gamma-glutamyl transpeptidase (GGT) blood test Prothrombin time (PT) Total protein Specifics Albumin Test American Association for Clinical Chemistry ALP (Alkaline Phosphatase) Test American Association for Clinical Chemistry Alpha-1 Antitrypsin Test American Association for Clinical Chemistry ALT (Alanine Aminotransferase) Test American Association for Clinical Chemistry AST (Aspartate Aminotransferase) Test American Association for Clinical Chemistry Bilirubin Test American Association for Clinical Chemistry Elevated Liver Enzymes Mayo Foundation for Medical Education and Research GGT (Gamma-Glutamyl Transferase) Test American Association for Clinical Chemistry Total Protein and Albumin/Globulin Ratio Test American Association for Clinical Chemistry Encyclopedia Bilirubin – urine Children Blood Test: Bilirubin Nemours Foundation Hepatic (Liver) Function Panel Nemours Foundation Start Here Liver Function Tests American Liver Foundation Liver Panel American Association for Clinical Chemistry Journal Articles Liver Function Tests