B12 Injection sites + How to use B12 Shots Safely Do You Have a B12 Deficiency: Quiz Dr. Lisa Watson Been unwell for a year, b12 injections again even though levels are 840? : r B12_Deficiency Laboratory findings of the patient before injection of vitamin B12. Download Scientific Diagram Feeling tired, foggy, or low on energy? Vitamin B12 plays an important role in keeping your body functioning at its best. B12 injections may help: Individuals with low B12 levels