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10.3390/toxins9110351 49 ChuS.-T.ChengH.-H.HuangC.-J.ChangH.-C.ChiC.-C.SuH.-H.et al (2007)
Unlike some other vitamins, vitamin B12 doesnt cause toxicity when levels are high

Limited human clinical trial data exists

[DOI] [PubMed] [Google Scholar] 34
Reconstitution and handling best practices preserve peptide integrity
