Amazon.com: Superior Source No Shot Vitamin B12 Methylcobalamin 10000 mcg, Quick Dissolve Sublingual Tablets, 30 Count, Active Form of B12, Increase Metabolism, Energy Production, Nervous System Support, Non-GMO : Health & Household
The antidiabetic drug metformin aids bacteria in hijacking vitamin B12 from the environment through RcdA | Communications Biology
Nutrients | Free Full-Text | Testing and Prescribing Vitamin B12 in Swiss General Practice: A Survey among Physicians