can b12 injection be given subcutaneous A Guide to the Best Needles for Injections How to Give a B12

Body size matters

Supporting a dominant role for diet composition in establishing the Firmicutes : Bacteroidetes ratio, previous work has shown that mice maintained on a high-fat diet had a similar cecal Firmicutes : Bacteroidetes ratio to those maintained on a high-carbohydrate diet 77

The 10 mg/day arm showed a smaller reduction than the 1 mg group, confirming the absence of a dose-dependent response above the threshold range

But judging by the various responses on here, it doesn't seem to matter unduly, other than for pain of the needle actually going in

Proper storage and shipping: Peptides degrade in heat

References Neelakantan H et al