can you do vitamin b12 injections yourself How to self-inject intramuscular - Overview How to Give Yourself a
Description
[PubMed: 23301732] 42

doi: 10.1111/j.1532-5415.1986.tb04902.x, 12
Cyanocobalamin is an inactive synthetic form that generally does not occur in nature
This gives you a clear reference point for the 28-day post-puncture limit
This already happens in Germany, Spain, and France