---
title: "TMAO (Trimethylamine N-Oxide) Test: What It Measures"
description: "A TMAO test measures a gut microbe–linked metabolite tied to cardiometabolic risk, with convenient Quest lab draws and PocketMD guidance via Vitals Vault."
canonical: "https://www.vitalsvault.com/biomarkers/tmao-trimethylamine-n-oxide"
last-updated: 2026-08-22
---

# TMAO (Trimethylamine N-Oxide) Test: What It Measures

> A TMAO test measures a gut microbe–linked metabolite tied to cardiometabolic risk, with convenient Quest lab draws and PocketMD guidance via Vitals Vault.

---

Canonical HTML: https://www.vitalsvault.com/biomarkers/tmao-trimethylamine-n-oxide
- [llms.txt](https://www.vitalsvault.com/llms.txt)
- [sitemap.xml](https://www.vitalsvault.com/sitemap.xml)
- [Developer portal](https://www.vitalsvault.com/developers)