Alkaline Phosphatase
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Test Overview
An alkaline phosphatase (ALP) test measures the amount of the enzyme ALP in the blood. ALP is made mostly in the liver 
and in bone with some made in the intestines and kidneys . It also is made by the placenta of a pregnant woman.
The liver makes more ALP than the other organs or the bones. Some conditions cause large amounts of ALP in the blood. These conditions include rapid bone growth (during puberty), bone disease (osteomalacia or Paget's disease), or a disease that affects how much calcium is in the blood (hyperparathyroidism), or damaged liver cells.
If ALP is high, more tests may be done to find the cause.
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| Last updated: | August 21, 2006 |
|---|---|
| Author: | Jan Nissl, RN, BS |
| Reviewed By: | Caroline S. Rhoads, MD - Internal Medicine, Alan C. Dalkin, MD - Endocrinology |
| Editors: | Susan Van Houten, RN, BSN, MBA, Tracy Landauer |
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