b12 injections middlesbrough B12 INJECTIONS - The Nurse
Description
In the case of suspected cobalt hypersensitivity, an intradermal test dose should be administered because anaphylactic shock and death have followed parenteral administration of cyanocobalamin

Using a solution that contains multiple sources of vitamins, you either intake vitamins into your veins or muscles
doi: 10.1038/sj.bjp.0707383

They can be injected into the muscle, usually in the arm or buttock
