DEAR READER: Variations in diet can lead to green stool. Green, leafy vegetables contain chlorophyll. Foods with purple coloring such as ice pops or gelatin desserts can turn stool rainbow colors. Foods rich in iron or iron supplements can also modify the color.

Bile is secreted in the small intestine and is green in color. Normally, the stool turns brown as it passes through the large intestine. However, if it passes faster than normal, it may be expelled while still green.

If your daughter’s stool remains green and diet or supplements are not a factor, she should make an appointment with a gastroenterologist for follow-up just to ensure there are no other problems that need to be addressed.