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If your B12 levels are already normal, extra supplementation may not significantly improve fatigue because the body usually eliminates excess B12

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Effect of gervital in attenuating hepatotoxicity caused by methotrexate or azathioprine in adult albino rats

Who should consider getting a Vitamin B12 shot

[DOI] [PMC free article] [PubMed] [Google Scholar] 85.Bian Q, Kato T, Monji A, et al
