can you give blood if you have b12 injections Do know the benefits of a vitamin B12 Shots & B12 Injections:

Protective style maintenance

B12 vitamin shots may cause pain at the injection site, mild diarrhea, and swelling

Situations or conditions that can cause vitamin B12 deficiency include: You are more likely to develop vitamin B12 deficiency if you have one or more of the following risk factors: Left untreated, vitamin B12 deficiency can cause lasting side effects that affect your nervous system and brain

An intramuscular B Vitamin injection in the arm or the buttock enters the bloodstream directly, increasing your energy in a matter of hours instead of weeks

AOD-9604 isn't available as a standard commercial medication