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McGuire DK, Marx N, Mulvagh SL, et al
General health status matters for risk tolerance
But long-term human safety data is limited
Significantly, vitamin B12 concentrations imply the levels of vitamin B12 in the circulation, and higher levels of serum vitamin B12 may not be directly caused by a higher intake, instead the dysregulation of the metabolism of this vitamin may contribute to higher levels of vitamin B12 in the circulation
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