GASTROINTESTINAL HEMORRHAGE (2): Melena. Melena, the passage of black, tarry stools, usually implies blood loss greater than 500 ml originating anywhere between the oropharynx and the right hemicolon. Melena occurs most often, What does your poop colour indicate? Pay attention. There's a lot to be learned by the colour and consistency of your stools, as well as the frequency and how easily passed Two Islands Why are healthy bowel motions important? Blog Let's talk about your bowels Four Seasons Dietetics Understanding Poop Color Meaning: Gut Health from Your Stool What Does It Mean If My Poop Is Black? Melena Guide