It’s come to the public’s attention that the new A1 Halloween Burger at Burger King will turn your poo Grinch-colored green.
The burger—which channels Japan’s All-Black-Everything Burger—features two black buns stained with food coloring. As the hype for the patty reaches its peak, customers are discovering that the scariest part of the meal isn’t the burger itself. Instead, it’s the side-effect that the food has on the burger-eater’s stool that is truly gruesome.
But can a fast-food burger, even if it has black buns, really turn your poo that strange green color? We reached out to a registered dietician with our question, and asked her to explain the concept of discolored stool for us and our readers.
RD Sarah Romotsky, the Director of Health & Wellness at the International Food Information Council in Washington DC, explains,
Okay, that makes sense, but what about green poop? Romotsky explains,
All of you who’ve experienced green poop after eating BK’s newest Whopper can rest assured: you are safe unless you start bleeding from your anus.
[via Twitter, Registered Dietician Sarah Romotsky]