Vegans and vegetarians, in particular, benefit from B12 injections because the B12 vitamin is found almost exclusively in animal products
Those with digestive issues, like Crohns disease or celiac disease, that impair nutrient absorption
Subcutaneous use is uncommon and dose-limited
Then I started taking sublingual methylcobalamin supplements and noticed (after a week of triple dosing!!) I started to feel a better, and all of those symptoms listed above seemed to improve a bit
For deficiency correction, weekly injections are often recommended for an initial period, followed by monthly maintenance
Although more research is needed to solidify these findings, evidence published by the American Academy of Pain Medicine points to the efficacy of B12 as an adjunctive treatment alongside lidocaine for pain management