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doi: 10.1016/j.toxlet.2012.11.020

doi: 10.1038/s41579-018-0036-x

Since its very hard to get an accurate measure of B12 in people, the researchers instead searched for levels of methylmalonic acid (MMA) as its levels rise when B12 levels decrease

Thus, interfering with these mechanisms and restricting amino acid access holds potential as an anticancer strategy 1
