how is b12 injection given Treating Severe Vitamin Deficiency Benefits of Vitamin B12 Shots
Description
[DOI] [PubMed] [Google Scholar] 112.Bostom A.G., Shemin D., Verhoef P., Nadeau M.R., Jacques P.F., Selhub J., Dworkin L., Rosenberg I.H

The body can do this but many times the reason the deficiency exists is because there is some venerability with formation of methyldonors (like methylcobalmin)

Too many candidates on the same course
Z Med Clinic & Med Spa (Houston)
