A member asked:

What causes a vitamin b12 deficiency?

A doctor has provided 1 answer
Dr. Evan Hirsch, MD answered

Specializes in Integrative Medicine

Multiple causese: There are several causes: low stomach acid, pernicious anemia, poor consumption of foods containing B12 and a genetic predisposition that requires more B12 like mthfr gene defect.

Answered 6/29/2018

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