---
title: "Symptoms of High Methylmalonic Acid: Causes, Ranges"
description: "High methylmalonic acid often means functional B12 deficiency or low kidney clearance; typical serum MMA is ~0.08–0.56 µmol/L. Retest at Quest—no referral."
canonical: "https://www.vitalsvault.com/symptom-levels/symptoms-of-high-methylmalonic-acid"
last-updated: 2026-08-22
---

# Symptoms of High Methylmalonic Acid: Causes, Ranges

> High methylmalonic acid often means functional B12 deficiency or low kidney clearance; typical serum MMA is ~0.08–0.56 µmol/L. Retest at Quest—no referral.

---

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