A Guide to Needle and Syringe Choices What Size Needle for B12 Injection? 12 Week Injection Cycle Pack 24x 21G Green & 25G Orange Needles + Swabs Does size matter? Historically, a bigger needle gauge was considered better to prevent damage to red blood cells. However, our recent guidelines recommend using smaller gauge needles (2325 G) for all Medsitis' Guide To Syringes & Needles.
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best needle size for b12 injections Dr. prescribed B12 injections. Pharmacy only gave me vials. Where do you get your needles and syringes? What size?? Where do I inject? : r/B12_Deficiency