what are the side effects of vitamin b12 injection benefits injection? Vitamin B12 Injections: Hot Shots?
Description
A 500 mcg dose is exactly 20 units

Interestingly, vitamin B12 deficiency resulting from insufficient alimentary intake typically takes approximately 2 to 5 years to develop, considering the important liver stores [36]

The data by Bok et al

Injections involve needles, though theyre quick and typically well-tolerated
(PubMed) Hutchinson J, Lentjes MA, Greenwood DC, et al

Patient Adherence : Tablets require strict timing, while injections demand comfort with needle use
