do b12 injections hurt why is so painful B12 Injections Hurt? Painful Shots No More · PA Relief Vitamin B12 Injections: Good or
Description
Once administered, hydroxocobalamin undergoes conversion in the body to active forms of B12, such as methylcobalamin and adenosylcobalamin
To unpack why the mechanism matters for dosing: NNMT sits at a metabolic crossroads

Experiences vary
Steady state (Weeks 38): Continue the same daily dose

This is the compound's most clinically robust finding

They rapidly raise blood B12 levels by bypassing the gut
