How high is too high for ALT?

Above 40 warrants context; sustained above 60-80 in non-athletes warrants imaging and workup for NAFLD or viral hepatitis.

Alanine Aminotransferase (ALT)

ALT is the most liver-specific of the standard liver enzymes. Elevated ALT signals hepatocyte damage — most commonly from NAFLD (fatty liver) in men 25-55, alcohol, medications, or viral hepatitis.

Category: Liver
Units: U/L
Reference range: <40 U/L (men)

What does a high Alanine Aminotransferase result mean?

Fatty liver (NAFLD), alcohol, viral hepatitis, drug-induced, intense exercise can transiently elevate.

What does a low Alanine Aminotransferase result mean?

Usually benign.

Why does Alanine Aminotransferase matter?

NAFLD is the most common liver issue in metabolically unhealthy men. Often the first sign before HbA1c shifts.

FAQs

How high is too high for ALT?: Above 40 warrants context; sustained above 60-80 in non-athletes warrants imaging and workup for NAFLD or viral hepatitis.

Want Alanine Aminotransferase interpreted in the context of your full panel? Every FORM bloodwork tier covers it, with an MD walking you through the result.

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