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.
Units: mg/dL; some labs report mmol/L (mmol/L = mg/dL × 0.25). Check the units on your report before comparing to any range here.
Optimal range: who says what
Institutions, researchers and practitioners draw the line in different places. Each position is listed with who holds it and, where a document states it, a link. How we verify ranges.
- Named practitioner8.6-10 mg/dL (over 40y)Life Extension · Lab Testing Protocol (Suggested Optimal Ranges)Disclosure: Life Extension sells lab panels that appear in our blood-test comparisons.
- No stated targetNo separate optimal establishedPersistent high-normal calcium warrants a PTH check
- Lab reference interval8.5-10.5 mg/dLWhat a lab report flags against. A lab interval is not an optimal target.
Practitioner targets are individual positions, often tighter than guideline ranges. Each was checked against its article before publishing.
21 of 21 itemized panels
Electrolytes & Minerals
Why Calcium 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?
Cheapest: Oura Health Panels at $99/year. Most comprehensive: Function Health, 160+ biomarkers for $365/year.
21 panels that include it, cheapest first
| Provider | Annual Cost | Total Biomarkers | $/Biomarker |
|---|---|---|---|
| $99 | 50 | $1.98 | |
| $190 | 100+ | $1.90 | |
| $250 | 65 | $3.85 | |
| $297 | 100+ | $2.97 | |
 Labcorp OnDemand | $338 | 50+ | $6.76 |
 Superpower | $349 | 100+ | $3.49 |
| $349 | 75+ | $4.65 | |
 WHOOP Advanced Labs | $349 | 65 | $5.37 |
 Function Health | $365 | 160+ | $2.28 |
| $365 | 100+ | $3.65 | |
| $375 | 108 | $3.47 | |
| $449 | 83 | $5.41 | |
| $495 | 80+ | $6.19 | |
| $499 | 100+ | $4.99 | |
| $700 | 138 | $5.07 | |
| $829 | 54 | $15.35 | |
| $895 | 100+ | $8.95 | |
| $996 | 59 | $16.88 | |
| $1188 | 70+ | $16.97 | |
| $1198 | 40+ | $29.95 | |
| $1950 | 130+ | $15.00 |
$/Biomarker is annual cost divided by the panel's advertised biomarker count, not the price of this one test. We track 23 blood test providers (32 plans); 21 of those plans are itemized marker by marker. Compare all of them.
11 providers not itemized in our matrix
We have not itemized these marker by marker (some sell tests one at a time), so this page cannot say whether they offer Calcium. Check with them directly.
Life Extension Standard · Quest Health · Ultrahuman Blood Vision · Lifeforce · Hundred Health · Personalabs · Walk-In Lab · HealthLabs · WHOOP Specialized Panels · Marek Health Essential · Vitality Blueprint Upload
Frequently Asked Questions
What is the optimal range for Calcium?
No separate optimal established: Persistent high-normal calcium warrants a PTH check. Named practitioners target: 8.6-10 mg/dL (over 40y) (Life Extension). Lab reference interval: 8.5-10.5 mg/dL. That is what a lab report flags against, not an optimal target.
Which blood test providers include Calcium?
21 of the 21 blood testing panels we itemize marker by marker include Calcium in their panels. This biomarker is widely available across major providers.
Related: YouBoost rates lifestyle and supplement interventions by evidence.
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 Sep 23, 2026 · First published Sep 30, 2025