Treating Vitamin B12 Deficiency: What Formulation Is Best?

Douglas S. Paauw, MD


March 09, 2020

An 82-year-old woman complaining of fatigue has a hemoglobin level of 8 g/dL with a mean corpuscular volume of 114 fL. Her B12 level is 90 pg/mL (normal level: > 200). Folic acid level is normal. Methylmalonic acid level is high.


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