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Most doctors advise using this area since there are no major blood vessels or nerves nearby that could be punctured by a needle
Attach the Injection Needle Secure the injecting needle (blue or green) onto the syringe and keep its cap on until ready
[4] Advertisement Some people aren't good candidates for this treatment, so be sure to let your doctor know if you have any allergies or health conditions
[3] Common conditions like gastritis, anemia, and Crohn's disease can diminish your B12 levels
Gently aspirate by pulling back slightly on the plunger to check for blood: If blood appears , stop, withdraw, and restart in a new spot
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