---
title: "RDW Test: What It Measures & What Results Mean"
description: "RDW shows how varied your red blood cell sizes are and can help explain anemia patterns; order through Vitals Vault and test at Quest locations."
canonical: "https://www.vitalsvault.com/biomarkers/rdw"
last-updated: 2026-08-22
---

# RDW Test: What It Measures & What Results Mean

> RDW shows how varied your red blood cell sizes are and can help explain anemia patterns; order through Vitals Vault and test at Quest locations.

---

Canonical HTML: https://www.vitalsvault.com/biomarkers/rdw
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