Aspartate Aminotransferase (AST)
Liver blood
What It Is
AST is an enzyme found in the liver, heart, and muscles. It is released when these tissues are damaged.
Why It Matters
AST helps assess liver health, particularly when evaluated alongside ALT. The ratio of AST to ALT can provide diagnostic clues.
If Levels Are High
Elevated AST may indicate liver damage, heart muscle injury, or muscle breakdown.
If Levels Are Low
Low AST levels are generally normal and not a concern.
Preparation
No special preparation usually required.
How Often to Test
Annually as part of liver function testing.
Panels Including This Marker
Important Disclaimer
This information is for educational purposes only and does not constitute medical advice or diagnosis. Results should be interpreted in clinical context by a qualified healthcare professional. If you have severe symptoms or urgent concerns, seek urgent medical help.