---
title: "Interleukin-6 (IL-6), Serum Test: What It Measures"
description: "It measures IL-6, a cytokine that rises with inflammation; interpret it with timing and symptoms, and order through Vitals Vault with Quest labs."
canonical: "https://www.vitalsvault.com/biomarkers/interleukin-6-il-6-serum"
last-updated: 2026-08-22
---

# Interleukin-6 (IL-6), Serum Test: What It Measures

> It measures IL-6, a cytokine that rises with inflammation; interpret it with timing and symptoms, and order through Vitals Vault with Quest labs.

---

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