Alkaline Phosphatase (ALP) Test

Alkaline Phosphatase (ALP) Test

Category
Liver
Sample
Blood sample taken from a vein in your arm
Reports () Terms & Conditions Report time varies with time of sample collection.
In 2 days
Fasting
No Fasting
Age
5+ Years

What Is This Test?

Measures alkaline phosphatase (ALP), an enzyme found mainly in the liver, bile ducts and bones.

Why this test is performed?

High levels can indicate bile duct blockage, gallstones, liver disease or bone conditions (such as healing fractures, vitamin D deficiency or Paget's disease). Levels are naturally higher in growing children and pregnancy.

Who should take this test?

Jaundice, nausea, abdominal pain or swelling, alcohol use, fatty liver, hepatitis risk, or people on long-term medicines.

Test Preparation

No fasting needed.

Medical disclaimer · for information only, not medical advice

This article is for general information and education only. It is not medical advice, does not create a doctor–patient relationship, and is not a substitute for consultation with a qualified doctor who has assessed your individual situation. Never delay seeking medical advice because of something you have read here.

In a medical emergency, call 112, or 108 for an ambulance where that service operates, or go to your nearest emergency department. If you are in mental health distress, Tele-MANAS is free and available 24×7 on 14416.

Read our Editorial Policy and Medical Review Process.

Frequently asked questions

Their bones are growing actively, so higher ALP is normal in children and teenagers.

No fasting is needed. You can eat and drink normally unless your doctor has advised otherwise.

Blood sample taken from a vein in your arm.

Usually within 11–35 hours after the sample reaches the lab. You will receive the report online.

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