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A member asked:
Can red soda or ketch-up cause black stools? not tarry, sticky, or worse smelling, just really dark/ almost (if not) black
A doctor has provided 1 answer
Sometimes: Hi With red soda, sometimes it can, although it really depends on the type of food coloring used and how much of it you consumed. I haven't heard of ketchup causing red stool before, but I would assume that if there was heavy food coloring used, it could be possible. Hope this helps
Answered 10/13/2018
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