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 ...