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Turner WL et al
PubMed ID: 11713213 Ng FM et al
The exact number of B12 injections that you will need to have, and their frequency, will be determined by the extent of the impact that your deficiency has on your health
Unknown Important limits These groups are not covered by established human research and should not be treated as proven safe-use groups
Not painful Once the needle is through the skin, there are few nerve sensors, making the injection almost painless
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