Stool is usually brown because of a balance of bilirubin and bile. Some conditions can cause bright yellow or pale yellow poop or diarrhea. Possible causes include dietary factors, stress, celiac ...

There’s a useful chart that can help you determine if your stool falls into a healthy or not-so-healthy category.

A sudden change to black, tar‑like stool, known as Melena, may signal bleeding somewhere in the upper digestive tract. While diet, supplements or medications sometimes explain the change, persistent ...