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What can cause your poop to be black?

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Foods, medicines, and supplements that turn poop black include:

Poop that looks like tar is often a sign of bleeding in the digestive tract. Some causes include:

If you don’t think black poop came from what you ate, you need to talk to your doctor.

  • Iron supplements
  • Bismuth subsalicylate (Kaopectate, Pepto-Bismol)
  • Black licorice
  • Blueberries
  • Ulcers
  • Bleeding sores in your esophagus from acid reflux
  • Noncancerous tumors
  • Cancer

From: What Do Different Poop Colors Mean? WebMD Medical Reference

SOURCES:

Mayo Clinic: “Stool Color: When to Worry,” “White Stool: Should I be Concerned?”

Johns Hopkins Medicine: “What Can Your Child's Poop Color Tell You?”

National Institutes of Diabetes and Digestive and Kidney Diseases: “Definition & Facts for Celiac Disease,” “Gastritis,” “Symptoms & Causes of GI Bleeding.”

Reviewed by William Blahd on February 24, 2017

SOURCES:

Mayo Clinic: “Stool Color: When to Worry,” “White Stool: Should I be Concerned?”

Johns Hopkins Medicine: “What Can Your Child's Poop Color Tell You?”

National Institutes of Diabetes and Digestive and Kidney Diseases: “Definition & Facts for Celiac Disease,” “Gastritis,” “Symptoms & Causes of GI Bleeding.”

Reviewed by William Blahd on February 24, 2017

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What does red poop mean?

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