---
title: "Dog Serum Albumin Re221 IgE Test: What It Measures"
description: "It measures IgE sensitization to dog serum albumin (Re221) to help clarify allergy triggers, with convenient ordering and Quest-based lab access via."
canonical: "https://www.vitalsvault.com/biomarkers/dog-serum-albumin-re221-ige"
last-updated: 2026-08-22
---

# Dog Serum Albumin Re221 IgE Test: What It Measures

> It measures IgE sensitization to dog serum albumin (Re221) to help clarify allergy triggers, with convenient ordering and Quest-based lab access via.

---

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