How to Inject B12?

Injecting Vitamin B12 is pretty simple. It is an intramuscular injection, meaning you don’t have to inject into a vein. Discuss with your doctor whether he or she recommends arm/stomach/leg as the site for injection, as each requires a different length needle. Most important, always remember to pull a little on the plunger to make sure you are not in a blood path before injecting the B12.