Alkaline Phosphatase

Also known as: ALP

Liver & Digestive Health Blood
Patient Friendly Summary

ALP has two homes — liver and bone. If it is raised, your doctor may order a GGT test or imaging to find which home it came from. A teenager's high ALP is usually just growth.

What this test means

ALP comes mostly from the liver's bile system and from bone. It rises when bile flow is blocked or when bone turnover is high.

Why it is done

It is done within liver panels, for bone pain evaluation, and to investigate itching or suspected bile-duct problems.

Understanding your value

If your value is high

High ALP can be seen with bile-flow obstruction, certain liver conditions, bone disorders, healing fractures — and normally in growing children and pregnancy.

If your value is low

Low values are uncommon and rarely significant.

About the normal range

Adult ranges are commonly about 40–130 U/L. Children and teens normally run much higher because their bones are growing.

When to consult a doctor

Discuss raised ALP with your doctor, particularly with jaundice, itching, or bone pain.

Frequently Asked Questions

It is done within liver panels, for bone pain evaluation, and to investigate itching or suspected bile-duct problems. Your doctor will decide if this test is right for your situation.

High ALP can be seen with bile-flow obstruction, certain liver conditions, bone disorders, healing fractures — and normally in growing children and pregnancy. This needs clinical correlation — always discuss your report with your doctor.

Low values are uncommon and rarely significant. This needs clinical correlation — always discuss your report with your doctor.

A single value rarely tells the whole story. Results need to be read together with your symptoms, history, and other tests. Please consult your doctor for a proper interpretation.

Quick Facts

  • TestAlkaline Phosphatase
  • Short formsALP
  • Sample typeBlood
  • CategoryLiver & Digestive Health

Related Terms

Liver Function High Normal Range

Specialists

Gastroenterology Orthopedics

Related Tests

Test
Bilirubin

The yellow pigment that causes jaundice when it builds up.

Explore
Test
SGPT / ALT

A liver enzyme that leaks into blood when liver cells are stressed.

Explore
Test
Vitamin D

Checks the vitamin your bones and muscles need, made mostly from sunlight.

Explore

Related Organs

Organ
Liver & Digestion

Your liver processes nutrients and clears toxins. Liver function tests (SGPT, SGOT, bilirubin) and abdominal u…

Explore
Organ
Bones & Joints

Bones and joints support movement. Vitamin D, calcium-related markers, inflammation tests (ESR, CRP), and X-ra…

Explore
Disclaimer: This information is for patient education only and does not replace medical advice, diagnosis, or treatment. Always consult a qualified doctor.