Why GLP 1 Therapy May Be Triggering Nutrient Crises and Muscle Loss in Indian Patients on Vegetarian Diets Vitamin B 12 Injections B12 Shots Cincinnati Instruction Guide for Intramuscular (IM) Self injection of B12 Methylcobalamin 1mg 5mg Lets do my first B12 injection together This is something Ive been nervous about for a long time, but today I finally did itand it honestly wasnt bad at all. I used the Union Medico needle guide Initiation of Vitamin B12 Via Intramuscular Injection for Home Care Client