vitamin b12 injections versus oral supplements vs. Supplements: Which is Better? Frontiers | Efficacy of sublingual
Description
Temova Rakua , Rokar R, Hickey N et al

By blocking NNMT, it elevates intracellular SAM and NAD+ levels, promoting fat cell differentiation arrest and enhancing metabolic rate

This brings up the main question: how often should I get a B12 shot for general wellness

The only thing that was holding me back was me

Consistency: Unlike oral supplements, which depend on gut health for absorption, injections ensure your body gets exactly what it needs every time

B complex injections can slightly sting during the injection, this is normal and the sensation should subside shortly after the injection is completed
