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Description
Cooked beef liver has the highest amount

Reid, B

When administered by a qualified medical professional, they carry minimal risk

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[DOI] [PMC free article] [PubMed] [Google Scholar] 45.Stromsdorfer KL, Yamaguchi S, Yoon MJ, Moseley AC, Franczyk MP, Kelly SC, Qi N, Imai S, Yoshino J

Retrieved 22 April 2022, from Vitamin B12