LIFESTYLE
06/10/2015 08:43 BST | Updated 06/10/2015 09:59 BST

Burger King's Halloween Whopper Is Turning People's Poo A Delightful Shade Of Green

Bowel movements beware...

Burger King's Halloween burger is providing a serious fright for customers, who have complained that it's turning their poo a ghoulish green.

People have taken to social media to moan (and sometimes jest) about the fast food joint's Halloween Whopper with the hashtag #GreenPoo.

green poo

The burger in question comprises flame-grilled beef with melted cheese, tomatoes, lettuce, mayonnaise, pickles, white onions and a black-coloured bun topped with sesame seeds.

It is available to buy in the UK and US throughout October.

The spooky-looking bun, which gets its colouring from A.1. Sauce, is believed to be the per poopetrator.

The company told ABC News that the black bun contains less than 1% food dye.

The most common reason for green poo is a dietary habit or change, such as being on a diet rich in dark green vegetables. But, according to Healthline, it can also be down to food colouring which doesn't get processed properly.

HuffPost UK has since reached out to Burger King for comment.

SEE ALSO:

Finally Revealed: Why Does Coffee Make You Poo?

This Is How Much Poo The World Produces In A Single Day

Scientist Reveals We've All Been Pooing Wrong

Poop Colour Chart