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My Breastfed Infant’s Poop Used to be Yellow but now it’s Green. Why?

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My Breastfed Infant’s Poop Used to be Yellow but now it’s Green. Why?

Sara Connolly, MD, FAAP, Board Certified Pediatrician • March 11, 2025 • 5 min read

Slower digestion means darker colors. Older infants often have stools that are green because they digest food a bit slower than they did when they were very young. Once a child begins eating solids, stools can be any number of colors, including green. Watch out for foods that can cause red stools, such as beets and artificial colors in fruit juice, to avoid unnecessary worry. Stool color is worrisome only if it’s white, gray, or black. In these cases, the color can indicate liver disease or bleeding and should be brought to your pediatrician’s attention.

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