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Description
However, you are at increased risk of vitamin B12 deficiency if any of the following applies: You're age 50 or older

Medication Interference : Some drugs, such as metformin, used for the treatment of Diabetic patients, and Proton-pump inhibitors, which treat patients with Acid reflux, prevent B12 absorption

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doi: 10.1111/j.1398-9995.2009.02220.x
