Reviewed: 16. April 2026
AP Alkaline Phosphatase (ALP)
Unit: U/l
Quick Explanation
Alkaline phosphatase (ALP) is an enzyme found in the liver, bones, and bile ducts. Elevated levels can indicate bile duct disease, liver problems, or bone disorders. Discuss persistently elevated levels with your doctor.
📊 Reference Values
ℹ️ Reference ranges may vary slightly between laboratories. Always compare your value with the reference range from your own lab report.
🔍 Possible Causes
Value too high — possible causes
- ·Bile duct disease
- ·Liver disease
- ·Bone disease (e.g. Paget's disease)
- ·Pregnancy
- ·Normal growth in children
Value too low — possible causes
- ·Hypothyroidism
- ·Vitamin B12 deficiency
- ·Zinc deficiency
This list shows possible causes — not a diagnosis. Only your doctor can correctly interpret your result.
🩺 Questions for Your Doctor
- →Is the elevation coming from the liver or from the bones?
- →Should I rule out a bile duct infection?
- →Do I need further tests?
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Medical Disclaimer
The content on this page is for general information only and does not replace professional medical advice, diagnosis, or treatment. Always consult your doctor or pharmacist for health-related questions. Lab values should always be assessed in the context of your personal medical history.