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A member asked:
Embarrassing, but what could cause blue green feces? i do not feel sick at all. could a sudden intake of more iron and zinc cause this?
A doctor has provided 1 answer
Blue/green stool: Blue food coloring is a popular food additive, and when ingested in large quantities can make stools appear blue. Blue is not a pigment typically produced by the human GI tract. Blue is however the color of ingestable "indicator" dyes & that a hemoccult card will turn if blood is detected in stool (or it taking a lot of iron, as in your case)--is this to what you are referring?
Answered 8/8/2016
2.5k views
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