The new Peeps Oreos are making a splash in an unexpected way. The pink creme filling is turning diners’ poop a vibrant hue, as BuzzFeed has sniffed out, which may not be the Easter surprise Peeps lovers were looking for.

The promotional sandwich cookies are dyed with a bright pink food coloring (Red Number 3, according to BuzzFeed) that is sure to leave your tongue looking like a Pepto-Bismol ad for some hours, according to a number of people who have posted on social media about the phenomenon. In a review, the Junk Food Guy wrote that the cookie dyed his saliva. He explained: "This is the type of food dye where an hour later, when I went to brush my teeth, IT TURNED MY TOOTHBRUSH PINK."

A lot of foods (especially brightly dyed candies) will dye your mouth for a little while after you eat. But this stuff really does last:

If you eat enough of them, that pink dye will run straight through you and possibly require you to scrub out your toilet. An anonymous mental_floss Oreo tester describes the color as “the kind of pink that if, say, your poop were to turn that color, you'd think you were hemorrhaging internally and had three minutes to live.” You probably don’t even have to eat the whole package.

Which is almost a reason in itself to try the super-sweet Oreos. Don’t worry, it won’t kill you, at least no more than any other junk food. Anyone who’s eaten too many beets is familiar with the ability of even normal foods to make your stool look terrifying. A few vivid cookies will just turn your body into a temporary science experiment. Just how long did it take the dye to work its way through your system?

Plus, Charmin is there to clean up your mess. Feel free to document your results—just maybe don't send them to us.

[h/t BuzzFeed]