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Can Probiotics Cause Dark Stool?

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Posted on Wed, 11 Oct 2017
Question: can probiotics cause dark stool
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Answered by Dr. Michelle Gibson James (41 minutes later)
Brief Answer:
not a known side effect

Detailed Answer:
HI, thanks for using healthcare magic

Probiotics are not usually associated with dark stool. Iron supplements and peptobismol can be associated with this color change.

Dark stool can also occur is there is blood from the upper gastrointestinal tract (esophagus,stomach, small intestines). As this blood travels through the bowel, it changes causing the stool to appear black.

If iron supplements or peptobismol are not being used, and the dark stool continues, it would be best to be assessed by your doctor.

I hope this helps, feel free to ask any other questions
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Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar
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Answered by
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Dr. Michelle Gibson James

General & Family Physician

Practicing since :2001

Answered : 16808 Questions

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Can Probiotics Cause Dark Stool?

Brief Answer: not a known side effect Detailed Answer: HI, thanks for using healthcare magic Probiotics are not usually associated with dark stool. Iron supplements and peptobismol can be associated with this color change. Dark stool can also occur is there is blood from the upper gastrointestinal tract (esophagus,stomach, small intestines). As this blood travels through the bowel, it changes causing the stool to appear black. If iron supplements or peptobismol are not being used, and the dark stool continues, it would be best to be assessed by your doctor. I hope this helps, feel free to ask any other questions