Phosphate In Urine
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Test Overview
The phosphate urine test measures the amount of the mineral phosphate in a urine sample that is collected over 24 hours (24-hour urine test). The body needs phosphate to build and repair bones and teeth, help nerves function, and make muscles contract. Most of the body's phosphate (about 85%) is found in bones. The rest of it is stored in tissues throughout the body.
The kidneys 
help control the amount of phosphate in the body. Extra phosphate is filtered by the kidneys and passes out of the body in the urine; if there is not enough phosphate, less is found in the urine. A high level of phosphate in the body is usually caused by a kidney problem.
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| Last updated: | March 06, 2006 |
|---|---|
| Author: | Sydney Youngerman-Cole, RN, BSN, RNC |
| Reviewed By: | Caroline S. Rhoads, MD - Internal Medicine, David C.W. Lau, MD, PhD, FRCPC - Endocrinology & Metabolism |
| Editors: | Susan Van Houten, RN, BSN, MBA, Tracy Landauer |
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