What causes black poop?

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Tags

1. #foods
2. #caused
3. #tract
4. #stool
5. #supplements
6. #detected
7. #stools
8. #blood
9. #problem
10. #diarrhea
11. #eating
12. #cases
13. #digestive
14. #along
15. #indicate
16. #right
17. #doctor
18. #upper
19. #through
20. #black
21. #cause
22. #vomiting