---
title: "Cardio IQ Vitamin D 25 Hydroxy Test: What It Measures"
description: "It measures your 25-hydroxyvitamin D status to guide safe dosing and retesting, with convenient ordering through Vitals Vault and Quest labs."
canonical: "https://www.vitalsvault.com/biomarkers/cardio-iq-vitamin-d-25-hydroxy"
last-updated: 2026-08-22
---

# Cardio IQ Vitamin D 25 Hydroxy Test: What It Measures

> It measures your 25-hydroxyvitamin D status to guide safe dosing and retesting, with convenient ordering through Vitals Vault and Quest labs.

---

Canonical HTML: https://www.vitalsvault.com/biomarkers/cardio-iq-vitamin-d-25-hydroxy
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