Acronym

ALT

Alanine aminotransferase

A liver-associated enzyme measured in liver function testing.

What it means

A liver-associated enzyme measured in liver function testing.

Clinical context

ALT is commonly used in Liver function tests, Laboratory medicine. The exact meaning can depend on specialty, region and local documentation practice.

Learning note

Use the full term when clarity matters, especially in formal assignments, prescriptions, handover and patient-facing communication.