This lab test evaluates a mineral that is important in many body functions and processes.

Phosphate Overview

Reviewed: April 21, 2014

Phosphate is a charged particle that contains the mineral phosphorus. Phosphorus is important for building and repairing bones and teeth, helping nerves to function, and making muscles contract.

Phosphate is measured in milligram per deciliter (mg/dL)

The normal range for phosphate is 2.5 - 4.5 mg/dL


Blood draw


Fasting is not required before the test.

What the results mean

A high level of phosphate in the blood is usually caused by kidney problems, acromegaly, tumors, or having too much vitamin D in the body.

Low values may be the result of severe malnutrition/starvation, alcohol dependence, or high calcium levels.