what needle do you use for b12 injections Dr. prescribed injections. Pharmacy only gave me vials. Where get your needles and syringes? size?? Where do I inject? : r/B12_Deficiency How to Give a B12

Common causes include pernicious anaemia (autoimmune condition), plant-based diets without supplementation, gastrointestinal surgery, and long-term use of metformin or proton pump inhibitors

Final Thoughts Getting your B12 injection dosage right isnt about following some cookie-cutter protocol its about understanding your unique biology and optimizing based on real data instead of guessing

Most patients begin to feel the benefits of the B12 shot within a few hours to a day, with results lasting up to a few weeks

Patients who do not receive timely treatment usually have severe developmental delays and severe brain damage