---
title: Complement C4a Lab Test Panel
description: "Measures complement component C4a in plasma, a fragment released when the complement cascade is activated. Review what this panel measures, who it may."
canonical: "https://www.vitalsvault.com/biomarkers/complement-component-c4a-plasma"
last-updated: 2026-08-22
---

# Complement C4a Lab Test Panel

> Measures complement component C4a in plasma, a fragment released when the complement cascade is activated. Review what this panel measures, who it may.

---

Canonical HTML: https://www.vitalsvault.com/biomarkers/complement-component-c4a-plasma
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