Whether you rush to the toilet on the reg or struggle to drop a deuce, you’ve probably heard the same advice: Eat more fiber. But how does the same recommendation hold true for two opposite GI ...

But at some point in your life, a less-than-appetizing question may have popped up as you lifted one to your mouth and zeroed in on the thin black line running along its back: Is that, um, poop?

Blue. Poop. Challenge. This didn’t start off as a viral social media trend, but as research into how well your digestive system and gut microbiome are working. And it’s something we can all try.