Glossary

ALT

ALT

Also: Alanin-Aminotransferase, GPT

ALT (alanine aminotransferase) is a liver value that is measured in the blood. Elevated values indicate damage to or inflammation of the liver cells.

Symptoms rather than terms?

Describe what's going on — we'll find the right doctor for you.

Editorial content · as of 9/5/2026