---
title: "Calcium Ionized Test: What It Measures & What Results Mean"
description: "It measures the active “free” calcium in your blood to assess calcium balance; order through Vitals Vault and test at a Quest lab with PocketMD support."
canonical: "https://www.vitalsvault.com/biomarkers/calcium-ionized"
last-updated: 2026-08-22
---

# Calcium Ionized Test: What It Measures & What Results Mean

> It measures the active “free” calcium in your blood to assess calcium balance; order through Vitals Vault and test at a Quest lab with PocketMD support.

---

Canonical HTML: https://www.vitalsvault.com/biomarkers/calcium-ionized
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