Self injecting vitamin B12. Quick and painless jabs after a B12 by Dr Caroline Palmer Medium Do You Need a Prescription for B12 Injections? OmegaQuant B12 vitamin Store Intramuscular vs Subcutaneous Injections for vitamin B12 supplements. B12 shots can help with energy, focus, and just feeling better. My personal experience with this injection is not realizing I felt like I was living under a dark cloud. until I felt like I wasnt. Still taking vitamin B12 injections? Move over shot. A pill may be just as good. Dr. Leslie Greenberg's Blog How to self inject intramuscular vitamin B12 Overview Guy's and St Thomas' NHS Foundation Trust