Proceeds from website advertising help sustain Lab Tests Online. AACC is a not-for-profit organization and does not endorse non-AACC products and services.

Methylmalonic Acid

Print this article
Share this page:
Also known as: MMA
Formal name: Methylmalonic Acid

At a Glance

Why Get Tested?

To help detect early and/or mild vitamin B12 deficiency; to help diagnose methylmalonic acidemia, a rare inherited metabolic disorder

When to Get Tested?

When you have a low vitamin B12 level and/or have symptoms of neuropathy, such as numbness and tingling in the hands and feet; as part of newborn screening

Sample Required?

A blood sample drawn from a vein in your arm or from a heelstick in newborns; sometimes a random or 24-hour urine sample

Test Preparation Needed?

You may be instructed to fast before sample collection for this test.