what happens if you inject b12 wrong How to self-inject intramuscular vitamin - Overview B12 Injections at Home -
Description
The nurse is only following physician orders

Rubbing it can irritate the area and slow down the healing process

There are often large gaps between total B12 and active-B12 levels in the blood

For some people, especially those with milder deficiencies caused by gaps in their diet, exploring alternatives can be a practical first step

Healthy diets help speed results after vitamin b12 energy shots
SAM and methyl-donor pools laboratory work has tracked changes in cellular SAM, SAH and 1-methylnicotinamide levels following NNMT inhibition