Alanine Aminotransferase (ALT)

Hepatic Panel

Normal Reference Ranges

Adult

7 - 56 U/L

Pediatric

10 - 40 U/L

Clinical Significance

More specific to the liver than AST. Marker of hepatocellular injury.

Causes of High

  • Hepatitis (Viral, Autoimmune)
  • Drug-induced liver injury
  • Ischemic hepatopathy (Shock liver)
  • Fatty liver disease

Causes of Low

  • Normal finding