who needs to take b12 injections for memory loss Benefits of Vitamin in Northglenn, CO B12 injections available now!!! Administered
Description
B12 injection doses can range from 100 mcg to 1,000 mcg, depending on the person, their age, and their condition
It thus affects almost all aspects of health (21)

Looking for a B12 shot near you
So if you are concerned, and have access to Pfizer, it may be the better option if you are worried about reacting