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And if you're allergic to cobalt, B12 injections aren't for you
However, doses higher that 1ml should not be administered via the upper arm
What syringe size should I use for B12 injections
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Depending on the amount of vitamin B12 solution you inject, you may use a syringe that holds slightly more than you need
With the needle still in, turn the vial upside down and pull the plunger back to fill the syringe with your B12 dose
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