Aspartate Aminotransferase

also known as AST

NORMAL_RANGE
10 – 40 U/L
UNIT
U/L

/WHAT_IT_IS

AST is similar to ALT but also found in muscle and heart. Heavy exercise commonly raises AST without indicating liver issues.

/NORMAL_RANGE

Reference: 10–40 U/L.

What does high AST mean?

  • +Same as ALT plus muscle damage (heavy training), heart issues.

What does low AST mean?

  • +Generally not clinically significant.

/ON_TRT

Elevated AST after a hard workout is normal and resolves in days. If you're concerned about liver, look at ALT and GGT together.

/RELATED

/TRACK_THIS

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Last reviewed: 2026-06-04 · MyTRT does not provide medical advice. Always consult your physician.