What does an Alanine aminotransferase (ALT) test evaluate?

The Alanine aminotransferase (ALT) test specifically evaluates liver function. ALT is an enzyme found predominantly in the liver, and its primary role is to facilitate amino acid metabolism. When liver cells are damaged or inflamed, they release ALT into the bloodstream, which leads to elevated levels of this enzyme. This increase can indicate various liver conditions, such as hepatitis, fatty liver disease, or liver injury. Thus, the ALT test serves as a crucial tool in assessing the health of the liver and diagnosing potential liver diseases. By focusing on ALT levels, healthcare providers can gain insights into a patient’s liver function and determine if further diagnostic tests or treatments are necessary.