Fast Five Quiz: Vitamin B12 Deficiency Key Aspects

Romesh Khardori, MD, PhD


January 17, 2023

Although screening average-risk adults for vitamin B12 deficiency is not routinely recommended, it may be warranted in certain populations. This includes patients who have used metformin for more than 4 months or proton pump inhibitors or histamine 2 receptor antagonists for more than 12 months. Although causation has not been definitively attributed to these medications, an association has been observed with these medications used over these durations.

Learn more about medications associated with vitamin B12 deficiency.


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