Green bowel movement can come from the intake of large quantities of green vegetables like spinach, lettuce or broccoli or green artificial color in foods and drink. Green bowel movement can also be due to over consumption of iron in supplement form. It is a sign that iron is not absorbed well in the body. Some individuals may also have green bowel movement due to some change in colonic transit time or if they have diarrhea. If the food is passed too fast from the intestinal tract, it tends to retain the color of bile which is green that in turn reflects in the stools.
Consult a specialist if you are suffering for green bowel movement for more time to diagnose the exact cause and treat it.
answered by S P