---
title: "Methylmalonic Acid (MMA) Test: What It Measures"
description: "It measures methylmalonic acid to help detect functional vitamin B12 deficiency, and you can order it through Vitals Vault with Quest lab access."
canonical: "https://www.vitalsvault.com/biomarkers/methylmalonic-acid-mma"
last-updated: 2026-08-22
---

# Methylmalonic Acid (MMA) Test: What It Measures

> It measures methylmalonic acid to help detect functional vitamin B12 deficiency, and you can order it through Vitals Vault with Quest lab access.

---

Canonical HTML: https://www.vitalsvault.com/biomarkers/methylmalonic-acid-mma
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