Results
The phosphate urine test measures the amount of
in a sample of urine collected over 24 hours
(24-hour urine test). Phosphate is a charged particle (ion) that contains the
phosphorus.
Normal
The normal values listed here—called a reference range—are just a guide. These ranges vary from lab to lab, and your lab may have a different range for what’s normal. Your lab report should contain the range your lab uses. Also, your doctor will evaluate your results based on your health and other factors. This means that a value that falls outside the normal values listed here may still be normal for you or your lab.
Results are usually
available in 1 to 2 days.
Phosphate in urine1| Adults: | 0.4–1.3
per 24-hour urine sample | 13–42
per day |
|---|
| Calcium- and phosphate-restricted diet: | Less than 1.0 g per 24-hour urine sample | Less than 32 mmol per day |
|---|
Many conditions can change phosphate levels. Your doctor will talk
with you about any abnormal results that may be related to your symptoms and
past health.
High values
High urine phosphate levels may be caused by:
- Kidney diseases.
- An overactive
().
- Too much
in the body.
Low values
Low urine phosphate levels may be caused by:
- An underactive parathyroid gland ().
- Kidney or liver diseases.
- Severe malnutrition.