injecting b12 worth it Are Vitamin Shots Right for You? can b12 injection make you
Description
Probably, and the prescriber should be testing B12 periodically

doi: 10.1080/07435800.2017.1381972

Campagna R, et al

In rare cases, when the injection-related trauma is more severe, significant shoulder or arm pain can persist for several months, necessitating careful attention to vaccination techniques to prevent these avoidable complications
A deficiency can result in anemia, characterized by reduced oxygen-carrying capacity of the blood

They are sold strictly as research chemicals for laboratory use
