VanishPoint 29 Gauge x 5 16 inch Retractable Insulin Syringe with Needle 1 mL, Regular Wall, 100 Box VITAMIN B12 (Generic) Injectable Solution, 1000 mcg mL, 100 mL vial Easy Refills Chewy Rx Cyanocobalamin (B12) 1000mcg mL Injection 30mL MDV McGuff 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
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what gauge for b12 injections What size gauge needle is needed for vitamin B12 (cobalamin) injections?