---
title: "Calcitriol (1,25-Dihydroxyvitamin D) Test: What It Measures"
description: "It measures your active vitamin D hormone to assess calcium balance and kidney/parathyroid signaling, with convenient ordering and Quest labs via Vitals."
canonical: "https://www.vitalsvault.com/biomarkers/calcitriol-125-dihydroxyvitamin-d"
last-updated: 2026-08-22
---

# Calcitriol (1,25-Dihydroxyvitamin D) Test: What It Measures

> It measures your active vitamin D hormone to assess calcium balance and kidney/parathyroid signaling, with convenient ordering and Quest labs via Vitals.

---

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