Phosphorus (Inorganic Phosphate)

Bone mineral and ATP building block — moves inversely with calcium.

What it is

Phosphorus (measured as inorganic phosphate) is essential for bone mineralisation, ATP energy production, and cell membrane integrity. It is regulated in parallel with calcium via parathyroid hormone and vitamin D.

Why it matters

Abnormal phosphorus levels can signal kidney disease, bone disease, or parathyroid disorders. Hypophosphataemia causes muscle weakness, bone pain, and impaired energy metabolism. It is clinically relevant in the context of chemotherapy-related renal tubular dysfunction.

How to test

Standard metabolic or renal panel.

This information is for educational purposes only. Always discuss testing and interpretation of results with your care team.

Optimal range

0.87–1.45 mmol/L.

How often

Each oncology blood panel.