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Vitamin K is one of the four fat-soluble vitamins our bodies need to function correctly. It¡¯s important for both bone formation and blood clotting.

But can the precursors of this vitamin actually kill cancer cells or slow its growth? If so, which type? If you¡¯ve heard talk or seen claims about this on social media, here¡¯s what you need to know.

A precursor is just something that comes before...