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 aspartate aminotransferase (AST) or bilirubin levels Ultrasound or other imaging Biopsy, in which a sample of tissue is tested for signs of disease Especially if you've had abnormal ALT ...