KIDNEY & LIVER
Aspartate Aminotransferase
Also known as AST
What it is
AST is a liver enzyme (also found in muscle and heart) released with cellular injury.
Why it matters
AST paired with ALT informs the pattern of liver stress. AST elevation without ALT elevation can suggest muscle rather than liver origin.
Range GPLX watches for
GPLX watches for AST within the lab reference range.
This educational range is not a personal diagnostic threshold. Your physician interprets your result in context of your full biomarker panel, medications, symptoms, and history.
What abnormal values can suggest
If low
A low AST value is generally not clinically significant.
If high
A high AST value can suggest liver injury, muscle injury (including hard training), alcohol effect, or medication effect.
This marker is reviewed when clinically appropriate as part of physician-directed labs. Membership is $39.99/month; consultation is $30.
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