what is a b12 injection
The b12 injection is important because this will help the body absorb the needed vitamin B12. There are reports that this type of injection is very painful because it has to be struck very deeply in the muscle of the person.he b12 injection is important because this will help the body absorb the needed vitamin B12. There are reports that this type of injection is very painful because it has to be struck very deeply in the muscle of the person.