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Also known as: Phosphorus; P; PO4
Formal name: Inorganic Phosphate

At a Glance

Why Get Tested?

To evaluate the level of phosphate in your blood and to aid in the diagnosis of conditions known to cause abnormally high or low levels

When to Get Tested?

As a follow-up to an abnormal calcium concentration, if you have a kidney disorder or uncontrolled diabetes, if you are taking calcium or phosphate supplements or have a nutritional problem

Sample Required?

A blood sample taken from a vein in your arm, or a fasting or timed urine collection (usually a 24-hour sample)

Test Preparation Needed?

Overnight fasting may be required for a blood sample; follow any instructions that you are given.