Description

The AST blood test measures the level of aspartate aminotransferase (AST), an enzyme primarily found in the liver. When liver cells are damaged, AST is released into the bloodstream, making this test useful for detecting liver injury or disease.

Why the AST Test Is Important

Your liver performs many essential functions, including producing bile, which helps digest fats and absorb nutrients. Measuring AST levels can help:

  • Detect liver damage caused by disease, medications, or injury
  • Monitor the effectiveness of liver treatment
  • Evaluate overall liver function as part of routine health screenings

AST testing is often performed alongside ALT (alanine transaminase) testing to provide a more complete picture of liver health.

Fasting: Not required.