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Metabolic Health

Phosphorus Test

A mineral that, with calcium, builds bones and teeth and supports many cellular processes.

Physician reviewed
Results in 1–3 days
4,000+ lab locations

What is Phosphorus?

A mineral that, with calcium, builds bones and teeth and supports many cellular processes.

Phosphorus Reference Range

These are the typical adult reference ranges used by major US labs. Your report will include the specific range used by the lab that processed your sample.

PopulationRange
age 18+2.50 – 4.50 mg/dL

Reference ranges are educational. Always interpret your result with the specific range printed on your lab report and discuss anything outside the range with a clinician.

What your Phosphorus result may mean

Higher than range

Often reflects kidney impairment or excess vitamin D.

Lower than range

Can reflect poor nutrition, alcohol use, or certain medications.

Educational only — not a diagnosis. Many factors can influence a single result. Discuss anything that concerns you with a healthcare provider.

Related Metabolic Health biomarkers

Markers commonly tested alongside Phosphorus.

Frequently asked

No. TestWell's licensed physician network reviews and approves your order — usually within minutes. You can place an order online without an in-person visit or a referral from your own doctor.

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