b12 injections and shingles How to Give B12 Injections
Description
These ranges come from allometric scaling of the animal work plus anecdotal reporting not human trials so anchor your expectations to that

A deficiency in vitamin B12 has been linked to depression and other mood disorders

doi:10.1016/j.jtauto.2021.100131

Nitrous oxide exposure (during surgery or recreational use) can inactivate B12 and cause rapid neurological deterioration in vulnerable individuals
