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Metformin, commonly used to treat type 2 diabetes, affects B12 absorption through a different mechanism
1 Deficiency is often due to a lack of B12 foods in the diet, absorption issues, and/or genetic mutations that affect uptake
This product has not been evaluated or approved by the FDA and is not for human or animal use
- Cyanocobalamin must be converted before your body can use it, and not everyone completes this step effectively
doi:10.1016/j.jtauto.2021.100131
Updated 2 July 2026
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