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A 26-year-old female asked:

Good day, my stool is black and i have been taking iron supplements as well, my stool also smells of blood. what could be the problem?

2 doctor answers3 doctors weighed in
Dr. James Ferguson
Pediatrics 47 years experience
Some thoughts: Iron supplements will darken stool color as a side effect7 may effect the smell. The only way to tell if this is due to blood would be to have the stool analyzed.
Created for people with ongoing healthcare needs but benefits everyone.
Dr. Heidi Fowler
Psychiatry 26 years experience
Stool: Iron supplements can cause stool to become grayish black or greenish black. Black, tarry, malodorous stool can be caused from blood in stool. A stool guiac could determine if there is or is not blood in your stool.
Created for people with ongoing healthcare needs but benefits everyone.

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Last updated Jan 30, 2021

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