---
title: "IgA Test: What It Measures & What Results Mean"
description: "An IgA test measures your mucosal antibody level to assess immune function and guide celiac testing, with convenient Quest lab ordering via Vitals Vault."
canonical: "https://www.vitalsvault.com/biomarkers/iga"
last-updated: 2026-08-22
---

# IgA Test: What It Measures & What Results Mean

> An IgA test measures your mucosal antibody level to assess immune function and guide celiac testing, with convenient Quest lab ordering via Vitals Vault.

---

Canonical HTML: https://www.vitalsvault.com/biomarkers/iga
- [llms.txt](https://www.vitalsvault.com/llms.txt)
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- [Developer portal](https://www.vitalsvault.com/developers)