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Methylmalonic Acid

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Also known as: MMA
Formal name: Methylmalonic Acid

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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 B12 deficiency such as numbness, tingling in the hands or feet, trouble walking, swelling of body tissues, or yellowing of the skin or eyes; 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.