Best Needle For B12 Injections (Size & Gauge) PA Relief What Syringe Size to Use for B12 TikTok How to self inject intramuscular vitamin B12 Overview Guy's and St Thomas' NHS Foundation Trust like, swipe, and save for when it's your turn to do an injection on a patient Intramuscular (IM) Angle: 90 Needle Size: 2225G, 11.5 inch Med Examples: Vaccines (e.g. Tdap, What needle size is best for injec Pernicious Anaemi Ivy Grove Surgery : Self administration of B12 injection