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10.1007/s00268-012-1663-4 [DOI] [PMC free article] [PubMed] [Google Scholar] Vukojevic J., Siroglavic M., Kasnik K., Kralj T., Stancic D., Kokot A., et al
Keep in mind that there is no consistent or reliable set of symptoms that permanently damage adults from B12 deficiency

Most protocols last 48 weeks, followed by a rest period

Are B12 shots better than pills
