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Methylmalonic Acid
Abbreviation: MMA
Panel: Vitamin & Mineral Tests · All vitamins & minerals tests
Typical adult reference range
| Conventional units | 0–0.40 µmol/L |
| SI units | 0–0.40 µmol/L |
Ranges vary between laboratories and methods — compare your result with the range printed on your own report.
What a high or low result can mean
High methylmalonic acid: high values can be seen in vitamin B12 deficiency and in kidney impairment.
These are associations, not a diagnosis: the same result can have several causes, and your clinician interprets it with the rest of your results and history.
Good to know
A functional marker that rises when vitamin B12 is insufficient at tissue level.
Related tests — Vitamin & Mineral Tests
Please note: Reference ranges vary between laboratories, and between the methods and instruments they use — the range printed on your own report is the one your result should be compared with. A result outside the range is not by itself a diagnosis, and a result inside it does not rule out illness. These pages are an educational summary, not medical advice: always discuss your results with the clinician who ordered them, who can interpret them in the context of your health and history.