Tests that measure normal liver function include albumin and bilirubin tests, according to Healthline. Doctors perform these tests to determine the efficiency of the liver in the production of albumin and disposal of bilirubin.
Albumin is a protein that the liver produces to counter body infections, notes Mayo Clinic. A low albumin level may imply that the liver is damaged or diseased. Bilirubin is a byproduct of red blood cell breakdown. Once it is produced, it enters the liver, which excretes it in the stool. If a test reveals a high bilirubin level, the implication may be that the liver is damaged or diseased.