---
title: "Crab F23 IgG Test: What It Measures & What Results Mean"
description: "It measures IgG antibodies to crab to support food-reaction evaluation and follow-up planning, with easy ordering and Quest-based lab access via Vitals."
canonical: "https://www.vitalsvault.com/biomarkers/crab-f23-igg"
last-updated: 2026-08-22
---

# Crab F23 IgG Test: What It Measures & What Results Mean

> It measures IgG antibodies to crab to support food-reaction evaluation and follow-up planning, with easy ordering and Quest-based lab access via Vitals.

---

Canonical HTML: https://www.vitalsvault.com/biomarkers/crab-f23-igg
- [llms.txt](https://www.vitalsvault.com/llms.txt)
- [sitemap.xml](https://www.vitalsvault.com/sitemap.xml)
- [Developer portal](https://www.vitalsvault.com/developers)