Methylmalonic Acid (Plasma)

Also known as: methylmalonic acid blood test, MMA, plasma MMA

What plasma methylmalonic acid test?

A plasma methylmalonic acid test is a test to determine the levels of methylmalonic acid in the blood plasma. It is a helpful test in the diagnosis of a vitamin B12 deficiency, and also for a disorder known as methymalonic acidemia.

What happens during the procedure?

A routine blood draw is required in order to begin the plasma methylmalonic acid - plasma test. The blood sample is then taken to a laboratory for testing and analysis.

Is any special preparation needed?

There is no special preparation needed.

What are the risk factors?

Infection, bleeding and damage to surrounding organs and tissues are potential risks of any blood draw.

Reviewed by: Sajel L Kana, MD

This page was last updated on: September 16, 2025 12:48 PM