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best gauge needle for b12 injection What Size Injection? what size needle to give
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For consistency across studies, document solvent, concentration, storage temperature, freezethaw cycles, and light exposure conditions in experimental records
The combination isn't without nuance

Our data suggest that oral maternal vitamin B-12 supplementation is effective at improving infant vitamin B-12 status, as well (37)

Cell 161 , 161172 (2015)

That is intentional: the two vial sizes reflect two different documented protocols and two different concentration setups, and it is a reminder never to eyeball a dose across vial sizes
