Burger King's new Halloween-inspired slushie has reportedly been turning people's poop different colors (like green, blue, and black).

Lots of people who drank the "Scary Black Cherry," slushie have taken to Twitter to tell their poop stories.

Food dyes may be to blame—which is safe, but still...spooky.

Burger King has a new "Scary Black Cherry" slushie, and it's aptly named AF...but not because the slushie is black.

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Turns out, the slushie is apparently turning people's poop some...unusual colors, according to lots and lots of Twitter posts.

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Dear @BurgerKing ,



Your "Spooky Black cherry" slushy turned my poop blackish blue. Thanks.



(Just like those spooky black bun sandwiches.)...



Thanks. — Jerky Jackal 🐺 🌐 🌻 🏳️‍🌈 (@GyldenUlv) October 15, 2018

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Even a little of the Halloween black cherry slushie at Burger King makes blueish poop. A new Halloween tradition started with the whopper last year — Bj/Thea (@BeejBug) October 16, 2018

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tell me why i had a black cherry slushy from burger king earlier and now my shit is purple ... like damn near neon — marz (@whosmarlena) October 11, 2018

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I drank a @BurgerKing scary black cherry icee and my shit turned blue. Neon blue. Everyone should get one. Blue poop makes everything seem better. — Eazy Dozer (@eazydozer) October 5, 2018

Most people are reporting green-, blue-, or black-colored stools (or a combination of the three).

This isn't the first time people have complained of this issue with Halloween-themed food at Burger King. The fast food joint's all-black Halloween Whopper from 2015 turned customers' bowel movements "neon green," according to USA Today.

With the burgers, the culprit was food dye, per USA Today—and a whole lot of it.

As Michael Rice, M.D., a gastroenterologist at the Michigan Medicine Gastroenterology Clinic, previously told WomensHealthMag.com, when food is dyed, it mixes with the yellow-green pigments in your bile. (Poop is made up of bile, dead cells, and unused food waste, btw).

Dark dyes like blue and purple often have the most intense effect on your poops, though it can happen with other colors, too, or even foods like beets and leafy greens that have intense natural pigments.

WomensHealthMag.com reached out to Burger King for comment but hasn't yet heard back.

If you've had one of these spooky slushies—or are really craving one—don't stress. According to Burger King's website, the food colorings they use "are commonly used in the industry and within the safe and Acceptable Daily Intake (ADI) approved by the Food and Drug Administration (FDA)."

One thing (I'm playing Debbie Downer right now, but I am a health editor): If you haven't had one of BK's Scary Black Slushies but are still seeing black poop, get that sh*t checked out ASAP. Sometimes black poop is totally normal (like if you're taking iron supplements, Rice says), but if it also has a tar-like texture, it could suggest something more serious is going on.

But again: Black (or green or blue) poop from drinking a BK slushie? Probably fine.

Amber Brenza Amber Brenza is the health editor at Women's Health, and she oversees the website's health and weight loss verticals.

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