What do the results mean?An ALT blood test is often part of liver function testing. Liver function tests measure several different proteins, substances, and enzymes and can determine how well your liver is working. Your health care provider may compare your ALT results with the results of other liver tests to help learn more about your liver function. High levels of ALT may indicate liver damage from hepatitis, infection, cirrhosis, liver cancer, or other liver diseases.Other factors, including medicines, can affect your results. Be sure to tell your health care provider about all the prescription and over-the counter medicines you are taking.Learn more about laboratory tests, reference ranges, and understanding results.
