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advantages and disadvantages of vitamin b12 injections What are the benefits injection? do b12 injections have side
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[2] When to Seek Further Medical Advice About B12 Patients should maintain regular contact with their GP or healthcare team throughout B12 treatment, but certain situations warrant urgent medical review

Why does needle size matter
doi: 10.1093/hmg/ddl215

Another study concluded that the sublingual and oral method were equally effective in resolving B12 deficiency in participants (Sharabi, 2003)
