Black Whopper causes green poop scare

buzzz worthy. . .

Burger King got into the Halloween spirit and unveiled a Black Whopper has scared some diners. While they should get credit for creativity, the fast food chain's new twist on their classic produces an odd side effect. Some people have reported via Twitter that their stool turns green after eating the limited-time-only sandwich!  One person tweeting after eating it said their poop turned bright green.The Black Whopper comes with the normal fixings (lettuce, tomato and onion) and A1 steak sauce baked into the burger  and on it.  Other than lettuce there is nothing green on it. 
  Burger King says they only use a
small amount of dye (1%) color the bun, adding they passed Food And Drug Administration requirements.

It is unclear what is causing the creepy colored poop.

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