Definition
What Phosphate measures
Serum phosphate (phosphorus) is the circulating inorganic phosphorus used in bone, energy chemistry, and acid-base balance.
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Kidney & electrolytesEssentialCompletemg/dL
Phosphate
The phosphorus held with calcium in bone and blood
Illustrative sample band · Synthetic
3.4mg/dL
2.1Sample target 2.5–4.5 mg/dL4.9
Why it matters
How clinicians usually read it
Tasso+ chemistry studies included phosphorus with good concordance on centrifuged samples. It is read with calcium, kidney function, and parathyroid context.
When it reads low
A lower value can mean
A lower phosphate can follow refeeding, vitamin D issues, or certain medications. One low value still needs the rest of the mineral panel.
When it reads high
A higher value can mean
A higher phosphate often tracks with reduced kidney clearance or excess intake. Creatinine and eGFR belong in the same conversation.
Questions for a clinician
Bring the number into a real conversation
01
Is this phosphate explained by my kidney numbers?
02
Should calcium and vitamin D be read with it?
03
Is this a one-off or a trend you want to follow?
Educational boundary
Educational information only. Displayed ranges are illustrative sample bands, not a diagnosis, treatment plan, or substitute for the contracted laboratory report and a qualified clinician.
See it as a sample result
The sample dashboard shows an illustrative reading, target band, and trend for Phosphate.