why do b12 injections hurt arm sore after injection pain does my arm after a shot? Pain Due To Vitamin B12 – does b12 injections help with

[3] Laboratory tests typically measure total B12 rather than the active form (holotranscobalamin), which can sometimes lead to misleading results

These effects are highest during the titration phase, typically peaking around weeks 6-8 of use, and resolve for the majority of participants as the body adapts, usually by week 10-12

In the loading phase, the NHS describes injections on alternate days for about two weeks, or until symptoms stop improving

The approach has been validated through extensive clinical research demonstrating that selectivity can be achieved without sacrificing efficacy for the targeted application