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The current gold standard for properly diagnosing B12 deficiency is the Urine MMA Level, due to the lack of sensitivity of the serum B12 test. The serum B12 test may produce false "normal" or "high" indications because of inactive B12 analogs in the blood from foods such as sea vegetables, or due to a body's last ditch dump from its bone marrow stores in response to severe deficiency. Available by mail from Norman Clinical Laboratories.
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Topics Related To Urine MMA
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| Test for B12 Levels | As A Treatment
"...A 24 hour urine MMA (Methylmalonic acid) test is claimed to be very sensitive but is also more expensive..."
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Vitamin B12 Requirement |
Our Question about your B12 level
"A urine MMA test is recommended for properly diagnosing B12 deficiency due to the possible lack of sensitivity of serum B12 tests..."
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Last updated: May 10, 2007
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