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A member asked:
What cause black poop? and by what can i define whether it's from food, medication or serious bleeding?! he is 70 years old and never had this problem.
A doctor has provided 1 answer
See below: Iron supplements and bismuth medications can't darken the stool. But in the middle-aged and above, any dark stool needs to be checked by a doctor - the risk of missing cancer is too great, even if also on iron or bismuth.
Answered 3/24/2013
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