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A member asked:
I am having black stool(not completely black but a little dark brown texture) fora month now(on most of the days) though i don't have any symptoms other that constipation sometimes.i do take keratonic(biotin and 10mg iron).is this a cause for concern?
A doctor has provided 1 answer
Oral iron is poorly absorbed and does cause stools to be black as can bismuth products or bleeding in the upper GI tract. Your physician can perform a simple test on your stool in the office to determine whether there is any occult blood in your stool.
Answered 7/19/2021
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How long after stopping iron pills will your stools not be black anymore? I get too constipated with them
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