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  1. New Vitamin B12 Test New Vitamin B12 Test February 9, 2012

    Who should get tested for vitamin B12 (cobalamin) deficiency and which is the best test to use: serum B12, methylmalonic acid (MMA), or holotranscobalamin levels?

  2. Vitamin B12 Recommendation Change Vitamin B12 Recommendation Change February 3, 2012

    Based on two biomarkers of functional vitamin B12 (cobalamin) status, B12 recommendations formulated more than a half century ago may need to be updated.