vitamin b12 monthly injection Methylcobalamin (Vitamin B12) How Often Should You Get
Description
For people who have trouble absorbing B12, this may be the best way to receive the vitamin

Contraindications and Special Populations Some people should be careful or not get B12 injections at all
We simply dont know enough to make such bold statements

however, the patients reported in this article indicated that the phenomenon was disturbing their daily lives