Vitamin B12 if you take metformin
TL;DR
Metformin can lower B12 absorption over time. If you use metformin, periodic B12 checks are guideline-aligned.
Evidence snapshot
Metformin-associated B12 deficiency is a known clinical consideration.
Metformin prescribing info / reviews (reference hub)
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Methylcobalamin vs cyanocobalamin?
Both can work; absorption and cost differ. Follow clinician preference and labs.
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Educational content only—not medical advice. Discuss changes with your clinician.