Calcium
Calcium is the most abundant mineral in the body and is needed for bone structure, muscle contraction, nerve signaling, and blood clotting. Serum calcium is tightly regulated by parathyroid hormone and vitamin D. High levels can indicate hyperparathyroidism, malignancy, or excess vitamin D, while low levels suggest vitamin D deficiency, kidney disease, or hypoparathyroidism.
21 of 22 providers
Electrolytes &Minerals
8.5-10.5 mg/dL
What is Calcium?
Calcium is the most abundant mineral in the body and is needed for bone structure, muscle contraction, nerve signaling, and blood clotting. Serum calcium is tightly regulated by parathyroid hormone and vitamin D. High levels can indicate hyperparathyroidism, malignancy, or excess vitamin D, while low levels suggest vitamin D deficiency, kidney disease, or hypoparathyroidism.
Why It Matters
Critical for bone health, muscle contraction, nerve transmission, and blood clotting. High levels may indicate parathyroid disease;low levels cause muscle cramps and heart rhythm problems.
Which Providers Test Calcium?
Full Provider Comparison
| Provider | Includes | Annual Cost | Biomarkers |
|---|---|---|---|
 Superpower | ✓ | $199 | 100+ (150 with ratios) |
 WHOOP Advanced Labs | ✓ | $349 | 65 |
 Labcorp OnDemand | ✓ | $398 | 40+ |
| ✓ | $486 | 40+ | |
| ✓ | $449 | 288 | |
| ✓ | $349 | 100+ | |
| ✓ | $829 | 54 | |
 Function Health | ✓ | $365 | 160+ |
| ✓ | $250 | 65 | |
| ✓ | $495 | 80+ | |
| ✓ | $895 | 100+ | |
| ✓ | $1950 | 130+ | |
| ✓ | $375 | 95+ | |
| — | $Varies | 75+ | |
| ✓ | $190 | 100+ | |
| ✓ | $99 | 50 | |
| ✓ | $124 | 60 | |
| ✓ | $349 | 130+ | |
| ✓ | $349 | 80+ | |
| ✓ | $375 | 85 | |
| ✓ | $700 | 128 | |
| ✓ | $99 | 100+ |
Frequently Asked Questions
What is Calcium?
Calcium is the most abundant mineral in the body and is needed for bone structure, muscle contraction, nerve signaling, and blood clotting. Serum calcium is tightly regulated by parathyroid hormone and vitamin D. High levels can indicate hyperparathyroidism, malignancy, or excess vitamin D, while low levels suggest vitamin D deficiency, kidney disease, or hypoparathyroidism.
What is the optimal range for Calcium?
The standard reference range for Calcium is 8.5-10.5 mg/dL. Optimal ranges may differ based on individual health goals and expert recommendations.
Which blood test providers include Calcium?
21 out of 22 blood testing providers include Calcium in their panels. This biomarker is widely available across major providers.
What category does Calcium fall under?
Calcium is categorized under Electrolytes &Minerals. This category includes biomarkers that help assess related aspects of health and wellness.
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Medical Disclaimer
This information is for educational purposes only and is not medical advice. Always consult with a qualified healthcare provider about your specific health needs.
Last reviewed:2026-04-12