An AST blood test measures levels of aspartate aminotransferase (AST) and helps determine liver function. Less than 40 IU/L is normal, but too much of this enzyme can indicate a problem, such as liver ...
The liver makes several enzymes to help function, including alanine aminotransferase, or ALT. Doctors can measure levels of ALT in the blood to help diagnose various liver conditions. Besides helping ...