Description
The Vitamin B12 test measures a substance called methylmalonic acid (MMA) in the urine, which is a specific indicator of low B12 status. The more MMA you have, the more likely you are to be low in this critical nutrient.
Disease/Condition
Vitamin B12 (cobalamin)
Location
Specimen
Type
Mass Spectrometry,
Chemistry
Analytes Included
- Methylmalonic acid (uMMA)
- Creatinine (Urine)
More Info
uMMA/Creatinine Ratio