ALT: The Test | Alanine Aminotransferase; ALT Test: Alanine Aminotransferase; SGPT; GPT; Serum Gluta
A low level of ALT in the blood is expected and is normal. Liver disease is the most common reason for higher than normal levels of ALT. Very high levels of ALT (more than 10 times normal) are usually due to acute hepatitis, sometimes due to a viral infec...