b12 injections for weight loss at home - Does it Even Work? B12 Injections & Weight Loss:

Can taking too much vitamin B12 through injections cause concerns

Not for injection or any injectable/IV/IM/SC use

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Payer contracts add another layer of variation on top of that

25 Volkov et al., who found that benefits were regardless of B12 status, discuss the possibility that patients in their study were deficient despite serum levels being within normal limits, as no other biomarker tests were carried out

The NHS guidance on hydroxocobalamin and the BNF entry are the references to follow, alongside the leaflet in your pack