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Clothes fit slightly looser around the waist
The information contained herein is not a substitute for and should never be relied upon for professional medical advice
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
Over a month, you and your provider can review those to see if the injection is helping
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