are b12 injections safe in children How to self-inject intramuscular vitamin - Overview On-The-Go B12 Injection at enTrust
Description
When there is excess B12 in your body, it usually gets excreted

You will notice an increase in energy two to three days after the injection

Of course, the vitamin B12 shots themselves do not stay in the body for five years
J Clin Endocrinol Metab 89 : 695701 Franco C et al