A healthy result should fall into the range 0 - 2.3 mcg/mg creatinine.
Methylmalonic acid (MMA) is a substance produced in very small amounts and is necessary for human metabolism and energy production. In one step of metabolism, vitamin B12 promotes the conversion of methylmalonyl CoA (a form of MMA) to succinyl Coenzyme A. If there is not enough B12 available, then the MMA concentration begins to rise, resulting in an increase of MMA in the blood and urine. The measurement of elevated amounts of methylmalonic acid in the blood or urine serves as a sensitive and early indicator of vitamin B12 deficiency.
If elevated, it reflects insufficient Vitamin B12.
Common symptoms if low B12:
Medications that interfere with or decrease B12:
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