Medically reviewed by Kumkum S. Patel, MD Noticing black stool can be alarming, but the cause isn’t always serious. Sometimes ...

Discover the top causes of black poop like diet, supplements, and gut health conditions, plus the best treatment options ...

It could be anything from a vitamin B12 deficiency to a symptom of anemia. The same is true ... it finally exits the body. (Is your stool a funny color? Here’s why your poop is green.) ...