---
title: "Methylmalonic Acid (MMA) Test: What It Measures"
description: "It measures methylmalonic acid to help detect functional vitamin B12 deficiency; order and review results with PocketMD via Vitals Vault/Quest."
canonical: "https://www.vitalsvault.com/biomarkers/methylmalonic-acid"
last-updated: 2026-08-22
---

# Methylmalonic Acid (MMA) Test: What It Measures

> It measures methylmalonic acid to help detect functional vitamin B12 deficiency; order and review results with PocketMD via Vitals Vault/Quest.

---

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