Stool Colors and What They Can Tell You Your stool color can carry important clues about digestion, diet, or even disease. Most shades are harmless, but some changes signal the need for Types of Poop: What Doctors Need You to Know The Healthy @Reader's Digest From red to green, what the colour of your poo says about your health and how to spot bowel cancer signs Hematochezia vs. melena: What's the difference? UT MD Anderson