Alanine Aminotransferase (ALT)Updated 3 months ago
What is ALT?
Alanine aminotransferase (ALT) is an enzyme mainly found in the liver, used to assess liver health. When liver cells are damaged, ALT is released into the bloodstream, making it a key marker for liver function.
Why is ALT important?
ALT levels rise when the liver is inflamed or damaged by factors like infections, alcohol, or drugs. It's more specific to the liver than another enzyme, AST, though other organs can also produce ALT. Elevated ALT can indicate liver issues, so it’s important to monitor it and consult a doctor if concerned.
Understanding ALT levels
ALT levels are measured in units per liter (U/L), with typical ranges for adults being ~11 to ~52 U/L. The Cardiometabolic Program classifies ALT as:
- Optimal: ≤ 25 U/L
- Good: 25.1-34.9 U/L
- Fair: 35-44.9 U/L
- Pay attention: ≥ 45 U/L
- Alert: >80 U/L
Normal ranges may vary by age, gender, and other factors, so it's best to discuss results with your doctor.
DISCLAIMER:
If you are concerned about your creatinine results always consult your physician.