I was part of a study where researchers tracked how long it took blue food dye to move through my system. Hilary Brueck/Insider I turned my poop blue for science (well, sort of), and you can too.

The internet has asked people to do numerous strange things before, from eating spoonfuls of cinnamon to planking. But now it wants you to turn your poop blue—for your own good, of course. Research ...

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