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Wellness 20 July 2025 7 min read Needle Size for a B12 Injection: A Simple Guide By Alaiyka Parvez Owner, CoLaz Aesthetics Clinic The short version For an intramuscular B12 injection, the usual choice is a 22 to 25 gauge needle, 1 to 1.5 inches long, given at 90 degrees into the deltoid
Desiree Granados Quick Summary: Self-injecting vitamin B12 involves proper technique, aseptic procedure, and correct dosing to avoid injection site reactions
Fasten the needle onto the end of the syringe
Thinner needles higher gauge numbers -are generally less painful
However, sometimes due to other health conditions or food preferences, this isnt always possible, but if you can, you should consume foods that provide this valuable vitamin