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What the Blue Poop Challenge Can Tell You About Your Gut HealthAnyone can participate in ZOE's Blue Poop Challenge: By eating muffins baked with royal blue food dye, which turns your poop blue, you can track how long it takes food to travel through your gut.
Randy Coffren, co-owner of The Royal Blue Bar, sat down with The News-Letter to talk about how the team came together, the ...
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