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Although there are alternative options of B12 supplemantation, such as oral pills, Vitamin B12 injections are the most effective delivery approach as they are best absorbed by th body since they bypass digestion by the stomach and intestines

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Vitamin B12 injections are generally safe, but some people may experience side effects, such as pain, redness, or swelling at the injection site, mild headaches, dizziness, nausea, or itching