---
title: "Vitamin B1 (Thiamine) Test: What It Measures"
description: "A Vitamin B1 (thiamine) test checks your thiamine status to help explain fatigue or nerve symptoms, with easy ordering through Vitals Vault/Quest."
canonical: "https://www.vitalsvault.com/biomarkers/vitamin-b1-thiamine"
last-updated: 2026-08-22
---

# Vitamin B1 (Thiamine) Test: What It Measures

> A Vitamin B1 (thiamine) test checks your thiamine status to help explain fatigue or nerve symptoms, with easy ordering through Vitals Vault/Quest.

---

Canonical HTML: https://www.vitalsvault.com/biomarkers/vitamin-b1-thiamine
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