---
title: "F2 Isoprostane Creatinine Ratio Test: What It Measures"
description: "It estimates oxidative stress from a urine lipid-peroxidation marker normalized to creatinine, with easy ordering and Quest draw sites via Vitals Vault."
canonical: "https://www.vitalsvault.com/biomarkers/f2-isoprostane-creatinine-ratio"
last-updated: 2026-08-22
---

# F2 Isoprostane Creatinine Ratio Test: What It Measures

> It estimates oxidative stress from a urine lipid-peroxidation marker normalized to creatinine, with easy ordering and Quest draw sites via Vitals Vault.

---

Canonical HTML: https://www.vitalsvault.com/biomarkers/f2-isoprostane-creatinine-ratio
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