still feeling tired after b12 injections Is it normal to feel injection? why do i feel more

That said, although side effects from vitamin B12 supplementation are very rare, it can possibly occur with B12 injections, but not with oral supplements

Chou R, Rosenquist R, Loeser J

References Puig, A., Mino-Kenudson, M., & Dighe, A

Although the company discourages using the vial for multi-dosing (it doesnt contain a preservative), one option would be to inject 1 mg (0.05 mL) weekly for 2 weeks, 2 mg (0.1 mL) weekly for 2 weeks, then 4 mg (0.2 ml) weekly

Shaking instead of rolling: Similarly problematic to rapid injection

Quantified Benefits: 66% Reduction in Shedding: Post-surgical graft shedding (shock loss) was reduced from a standard 30% down to only 10%