ALT stands for Alanine Aminotransferase.
What does ALT mean?
a liver enzyme measured to check for liver damage
ALT stands for alanine aminotransferase, an enzyme found mainly in liver cells. When the liver is injured, ALT leaks into the blood, so a raised ALT level is a sensitive sign of liver damage. It is a key part of liver function tests and is often reported alongside AST, another liver enzyme. An older name for ALT is SGPT. The pattern and ratio of ALT to AST can give clues about the cause of liver injury.
When is ALT used?
ALT appears in liver function panels ordered in primary care, hepatology, and general medical settings.
Frequently asked questions
What does ALT stand for?
ALT stands for alanine aminotransferase, a liver enzyme measured to check for liver damage.
What does a high ALT mean?
A raised ALT is a sensitive sign that liver cells have been injured and are leaking the enzyme into the blood.
What is the old name for ALT?
ALT was previously known as SGPT.
How does ALT relate to AST?
Both are liver enzymes. The ratio of ALT to AST can help suggest the cause of liver injury.