What Is a Normal B12 Level?

By Staff WriterLast Updated Apr 5, 2020 1:18:09 PM ET

According to the National Institutes of Health Medline Plus, a normal vitamin B12 level ranges from 200 to 900 picograms per milliliter. Any level below 200 picograms per milliliter is considered a B12 deficiency, most often seen as a side effect of pernicious anemia.