Calcium
Disclaimer: Information on this page is for educational purposes. Consult a physician to interpret your test results. Lissa Health helps track biomarker trends but does not replace medical advice.
What This Test Measures
Calcium is vital for bones, muscle contraction, nerve transmission, and coagulation. ~50% in blood is albumin-bound.
With low albumin, use corrected calcium formula. Ionized calcium is gold standard when albumin is abnormal.
Hypercalcemia and hypocalcemia can be life-threatening and require urgent correction.
Normal Ranges
| Group | Reference Range |
|---|---|
| Men | 8.6–10.2 mg/dL (2.15–2.55 mmol/L) |
| Women | 8.6–10.2 mg/dL |
| Children | 8.8–10.8 mg/dL |
Reference ranges may vary by laboratory and assay method.
Causes of High Levels
- Primary hyperparathyroidism
- Malignancy (bone metastases)
- Vitamin D excess
- Sarcoidosis
- Thiazide diuretics
Causes of Low Levels
- Vitamin D deficiency
- Hypoparathyroidism
- Chronic kidney disease
- Hypoalbuminemia
- Acute pancreatitis
Test Preparation
- Fasting not required
- Report supplements and diuretics
Related Biomarkers
| Biomarker | Relationship |
|---|---|
| Albumin | Corrected calcium |
| Phosphorus | Bone-mineral axis |
| Vitamin D | Absorption regulation |
FAQ
How often should I take this test?
With bone disease and CKD — every 3–6 months.
What should I do if my result is abnormal?
Hypercalcemia symptoms (thirst, confusion, arrhythmia) — emergency care.
Last updated: June 2026