vitamin d and b12 injection side effects Deficiency: Symptoms, Causes & Treatment Are B12 Shots Safe? Royal
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2009;28(1):p

doi: 10.1089/neu.2008.0746 19 KohnoKKoya-MiyataSHarashimaATsukudaTKatakamiMAriyasuTet al
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In severe cases, prolonged B vitamin deficiency can lead to beriberi, pellagra, or Wernicke-Korsakoff syndrome, the last of which causes serious neurological problems
