Liver Function
ALT
Normal Range:7-56 U/L
Optimal Range:10-25 U/L
What is ALT?
ALT (Alanine Aminotransferase) is an enzyme found mainly in your liver. When liver cells are damaged, ALT leaks into your bloodstream.
Why ALT Matters
ALT is a sensitive marker of liver damage. Elevated levels can indicate fatty liver disease, hepatitis, medication effects, or other liver conditions.
Symptoms of Low ALT
- Usually not concerning
- Very low levels are normal
Symptoms of High ALT
- Often no symptoms
- Fatigue
- Abdominal pain
- Jaundice (yellowing)
- Dark urine
- Nausea
Reference Ranges
| Range Type | Minimum | Maximum | Unit |
|---|---|---|---|
| Normal Range | 7 | 56 | U/L |
| Optimal Range | 10 | 25 | U/L |