Bile: Bile is green. It enters the bowel right after food exits the stomach. As the bile travels through the bowel, it turns yellow, then brown. If stool is moving fast through the bowel, it doesn't have time to turn brown, so it may come out yellow or even green. Stool travels faster when the bowel is irritated, such as when there is a virus.
Answered 3/3/2018
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