---
title: "IgG Test: What It Measures & What High or Low Results Mean"
description: "An IgG test measures your most abundant antibody to assess immune function and past exposure, with easy ordering and Quest lab access via Vitals Vault."
canonical: "https://www.vitalsvault.com/biomarkers/igg"
last-updated: 2026-08-22
---

# IgG Test: What It Measures & What High or Low Results Mean

> An IgG test measures your most abundant antibody to assess immune function and past exposure, with easy ordering and Quest lab access via Vitals Vault.

---

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