I pooped green once...?

Question:

... How come?

Answers:
There are generally two causes for a green bowel movement:

1. something you have ingested, such as large amounts of green, leafy vegetables, green or purple artificial colouring, or iron supplements
2. a variation in the gut transit time, particularly fast transit caused by diarrhea and IBS.
The colour of a bowel movement generally depends on the colour of the food eaten and the state of the bile that is produced by the liver. Bile is green in color and is only changed to brown through a proper digestive process, which takes time.

So, if the food is travelling too fast through the intestines there is no time for the bile to be chemically changed, and so it will remain green until it is expelled from the body.

I pooped green once...?

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