---
title: "Small Dense LDL (sdLDL) Test: What It Measures"
description: "It measures the amount or pattern of small, dense LDL linked to higher heart risk, with convenient ordering and Quest-based lab testing through Vitals."
canonical: "https://www.vitalsvault.com/biomarkers/sdldl"
last-updated: 2026-08-22
---

# Small Dense LDL (sdLDL) Test: What It Measures

> It measures the amount or pattern of small, dense LDL linked to higher heart risk, with convenient ordering and Quest-based lab testing through Vitals.

---

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