---
title: "p-Tau181 (Alzheimer's Marker) Lab Test Panel"
description: "Measures phosphorylated tau 181 in plasma to support clinical evaluation of cognitive symptoms. Review what this panel measures, who it may help, and how."
canonical: "https://www.vitalsvault.com/biomarkers/p-tau181-phosphorylated-tau-plasma"
last-updated: 2026-08-22
---

# p-Tau181 (Alzheimer's Marker) Lab Test Panel

> Measures phosphorylated tau 181 in plasma to support clinical evaluation of cognitive symptoms. Review what this panel measures, who it may help, and how.

---

Canonical HTML: https://www.vitalsvault.com/biomarkers/p-tau181-phosphorylated-tau-plasma
- [llms.txt](https://www.vitalsvault.com/llms.txt)
- [sitemap.xml](https://www.vitalsvault.com/sitemap.xml)
- [Developer portal](https://www.vitalsvault.com/developers)