One case report detailed a 93-year-old woman who reported lime-green stool after consuming a hamburger bun dyed black using yellow, blue, and red food dye. It's unclear how exactly food dye ...

There are some exceptions to this: If you’re taking iron supplements, for example, your stools may appear dark green to the point where they almost look black. If you’ve taken bismuth ...

The Blue Poop Challenge tracks your gut transit time and can reveal some interesting secrets about your digestive system. The time it takes for food to travel through your digestive system can ...

Social media users have been posting pictures of vibrant-blue cupcakes with the unique hashtag #bluepoopchallenge. Yep, that’s right. Blue. Poop ... poo for a blue or green-blue tinge and ...

Although green, yellow, and brown hues are generally normal, black, red, or white poop may sometimes signal underlying issues. In the first week of life, a baby's stool changes from meconium to ...