Normally, ALT levels in the blood are low. If your liver is damaged, it will release more ALT into your blood and levels will rise. But your ALT level alone doesn't give doctors a full picture of ...

ALT is involved in cellular energy production. ALT levels in your blood are usually low, but they can rise if you have liver disease, damage, or toxicity. ALT blood tests are often part of ...

are two liver enzymes measured in a blood test to check the health of your liver. High AST and ALT levels are a general sign of a liver problem. Based on which enzyme is elevated—or if both are ...