Ionized Calcium
Ionized calcium is the free, biologically active part of blood calcium. It does not depend on the protein level.
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Normal ranges
Adults: 1.0–1.37 mmol/L.
Units: mmol/L
Causes of deviations
Low levels:
Hypoparathyroidism, vitamin D deficiency, massive transfusion.
High levels:
Hyperparathyroidism, cancer, prolonged immobilisation.
When to see a doctor
If the value is outside the range, discuss it with your doctor.
Related biomarkers
Panels
Electrolyte panel
Conditions
HypocalcemiaHypercalcemia
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