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Interpret Your Alanine Aminotransferase Results
Enter your ALT value below and get an instant, free AI interpretation — a plain-English explanation checked against WHO/IFCC reference ranges.
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Alanine Aminotransferase Normal Ranges
ALT is an enzyme found predominantly in liver cells (hepatocytes).
| Age Group | Sex | Reference Range | Unit | Notes |
|---|---|---|---|---|
| Adults (18–64) | Male | 7 – 56 | U/L | — |
| Adults (18–64) | Female | 7 – 45 | U/L | — |
Also reported in: IU/L.
Common Causes of High ALT
Viral hepatitis (A, B, C, E)Non-alcoholic fatty liver disease (NAFLD/MASH)Alcoholic liver disease
Common Causes of Low ALT
Not clinically significant (low ALT is normal)End-stage liver disease (liver has lost mass, less enzyme present)Hemodialysis (enzyme cleared)
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