who can give vitamin b12 injections Should Take And Why? Are Vitamin B12 Shots Right
Description
Individuals with a faster metabolic rate may burn through their B12 reserves more quickly, while those with a slower metabolism might retain the vitamin for a longer period

Its not clear why this occurs, but some doctors have reported cases of fever that has normalized after treatment with low levels of vitamin B12

Mechanism notes, evidence grades A-D, FAQs,

I learned last year that I am severely vitamin b12 deficient and in this video I give myself an injection
