With some liver diseases, the level can be more than 50 times the ULN. Levels this high are described as deranged. While it may seem that a high ALT is all that is needed to diagnose liver disease ...

Alanine aminotransferase (ALT) is an enzyme primarily found in your liver. An enzyme is a protein that helps speed up chemical reactions. ALT is involved in cellular energy production. ALT levels ...

Since it usually doesn’t cause noticeable symptoms, here’s how to check if you are at risk: Blood tests: Elevated liver enzymes (ALT and AST) can be a sign of liver fat buildup. Ultrasound or ...