---
title: "Thyroid Peroxidase (TPO) Antibodies Test: What It Measures"
description: "It checks for immune antibodies that target your thyroid and can signal autoimmune thyroid disease, with easy ordering and Quest-based labs via Vitals."
canonical: "https://www.vitalsvault.com/biomarkers/thyroid-peroxidase-antibodies-tpo"
last-updated: 2026-08-22
---

# Thyroid Peroxidase (TPO) Antibodies Test: What It Measures

> It checks for immune antibodies that target your thyroid and can signal autoimmune thyroid disease, with easy ordering and Quest-based labs via Vitals.

---

Canonical HTML: https://www.vitalsvault.com/biomarkers/thyroid-peroxidase-antibodies-tpo
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