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What Causes Black Colored Stool?

Posted on Tue, 13 Oct 2015

Question: Black stool not caused by book. Have had complete GI, Stomach and Throat check up. Doctor has no answers. Possible causes? Next step?

not caused by blood (I misspelled) No sign of blood in stool. Not5 lactose intolerant.

Answered by Dr. Amit Jain (20 minutes later)

Brief Answer:
Please give some details of below

Detailed Answer:
Hello! Thanks for putting your query in HCM. I am a Gastroenterologist (DM). Please tell whether you have undergone colonoscopy and small bowel evaluation. What is your hemoglobin levels? Have you got your stool exomination for occult blood or microscopic examination? This is very important for me to know to better understand your issue. Waiting for reply

Above answer was peer-reviewed by : Dr. Neel Kudchadkar

Follow up: Dr. Amit Jain (31 minutes later)

Yes on tests you noted. Nothing out of the ordinary found. No blood in stool. No abnormalities in the GI. Hemoglobin normal.

Possible causes? What other internal organs might be involved? What additional tests would you recommend? I see my specialist next week.

Answered by Dr. Amit Jain (6 minutes later)

Brief Answer:
if all these tests are normal then it may be due to diet rich in iron

Detailed Answer:
Thanks for feedback. I have gone through all the medicines you are taking, none of them cause black stool. All test are normal then it suggest that it may be due to intake of diet which may be rich in iron like banana etc. So I will advise to discuss your dietary habits with doctor which seems to be the only cause of black stools in you

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Above answer was peer-reviewed by : Dr. Neel Kudchadkar