why b12 injections instead of pills Vitamin Shot Vs Pill Are B12 Shots Safe? Royal
Description
A case-control study on adverse effects: H2 blocker or proton pump inhibitor use and risk of vitamin B 12 deficiency in older adults

Benefits, where present, require continued administration nothing about the injection produces a lasting metabolic change once it stops

That is also when your health practitioner will know if this route is viable for you or not

Methylcobalamin, on the other hand, skips that conversion and directly enters B12-dependent biochemical reactions