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B12 deficiency symptoms include chronic diarrhea, lethargy, weight loss, and neurological issues

doi: 10.1590/s0004-282x2006000500026 115 VarlamovEVHinojosa-AmayaJMFleseriuM

Conclusion : grer les effets secondaires de la vitamine B12 avec discernement Les effets secondaires de la vitamine B12 restent rares et gnralement bnins

This pharmacokinetic profile has made it a subject of investigation in neuroendocrinology, sleep research, and stress physiology at the laboratory level

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Its become a focus of recent studies looking into inflammation and immune-regulation