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These recommendations do not represent FDA approval, and any addition to the list still requires public rulemaking
Are vitamin B12 shots safe
Absorption is limited to approximately 1.5 g per dose through the intrinsic factor pathway, though passive diffusion allows absorption of about 1% of higher doses
Gallagher C, Emmanuel OO
Benefits of B12 Injections B12 injections can be more effective supplements than daily pills, because they allow for a more precise, accurate dose that delivers only what your body needs
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