---
title: "Beta-Amyloid 42/40 Ratio (Alzheimer's Marker) Lab Test Panel"
description: "Reports plasma amyloid beta 42, amyloid beta 40, and their ratio to support clinical evaluation of cognitive symptoms. Review what this panel measures."
canonical: "https://www.vitalsvault.com/biomarkers/beta-amyloid-42-40-ratio-plasma"
last-updated: 2026-08-22
---

# Beta-Amyloid 42/40 Ratio (Alzheimer's Marker) Lab Test Panel

> Reports plasma amyloid beta 42, amyloid beta 40, and their ratio to support clinical evaluation of cognitive symptoms. Review what this panel measures.

---

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