What Is the Blue Poop Challenge -- And Should You Do It?

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Playing What Is the Blue Poop Challenge -- And Should You Do It?

What is the blue poop challenge and why are celebrities getting on board? By eating blue-dyed foods you can track just how long it takes for your food to travel through your body. Roughly 70 million people in the United States have digestive diseases, and gastroenterologist Dr. Su Sachar and epidemiologist Dr. Tim Spector weigh in on what can be learned from how long it takes your food to come out the other end.

How Long Should It Take for Your Food to Travel through Your System?