Mineral BalanceUpdated 2025-12-24Medically Reviewed
Ionized Calcium
Everything you need to know about Ionized Calcium levels, including what normal ranges look like and what abnormal results might indicate.
Standard Reference Range
Unit: mmol/LMale Reference Range
1.12–1.32 mmol/L
Female Reference Range
1.12–1.32 mmol/L
i
Reference ranges may vary slightly between laboratories. Always consult your doctor for interpretation.
What is Ionized Calcium?
Ionized calcium measures the biologically active, unbound fraction of calcium in blood, unaffected by albumin levels.
Key Takeaway
When albumin is low or pH is abnormal, ionized calcium gives a truer picture than total calcium.
Why is this test performed?
- Evaluate symptoms like tingling, muscle cramps, or arrhythmias
- Assess critical illness, kidney disease, or parathyroid disorders
- Monitor transfusions or large volume IV fluids that alter pH
Interpreting Your Results
- High: Hyperparathyroidism, malignancy, vitamin D excess, acidosis
- Low: Hypoparathyroidism, vitamin D deficiency, pancreatitis, alkalosis, citrate from transfusions
Related Tests
- Calcium: Total level; may mislead when albumin is low
- Albumin: Binds calcium; adjust total calcium if ionized not available
- Magnesium/Phosphorus: Move with calcium in many disorders
Decode your Ionized Calcium Results
Upload your PDF report to WellAlly. AI will visualize your trends and provide personalized health insights instantly.