acurate diagnostic test for vitamin B12 deficiency

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When a B12 level is normal or low normal but a deficiency is still suspected, ordering a methylmalonic acid (MMA) test as an early indicator of B12 deficiency. A low B12 and/or folate level means that a patient has a deficiency.

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ADVISABLE 1. CBC..... FOR ANEMIA. AND LARGE. R. B. C 2. M. M. A. TEST

MMA .. TEST..

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MMA rest is quite specific