A member asked:

Does red wine turn your poop black?

A doctor has provided 1 answer
Dr. Thomas Wright answered

Specializes in Phlebology

Sometimes: Red wine does not usually cause blackened stool. It sometimes causes green stool, as it may contain dyes [that are also used in grape sodas and grape candies] that cause stool to green. If it has very high tannins. Meaning grape skins were left in the wine a very long time this may cause a darkening of stool.

Answered 1/1/2021

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