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The best type of B12 depends on your diet, metabolism, and symptoms
In this case, the deficiency from either of them alone will be better than having both of them, because having both will make the consequences more severe
[DOI] [PMC free article] [PubMed] [Google Scholar] 14.Liu M, Li L, Chu J, Zhu B, Zhang Q, Yin X, Jiang W, Dai G, Ju W, Wang Z, Yang Q, Fang Z
