Is Your Baby's Green Stool Normal? Infant Digestive Changes - Pediatrics

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Is the baby's stool considered normal?


Hello Doctor: My sister is currently 2 months old.
A week ago, her stool changed from golden yellow to dark green, with the front half being dark green and the back half golden yellow (the back half was a bit watery).
However, in the past few days, her stool has become entirely dark green with some golden yellow mixed in, and it has become a bit watery.
My sister is currently on formula milk, and I noticed that after opening a new can of formula, her stool started to turn dark green.
Is this normal, Doctor? Thank you!

Qing, 20~29 year old female. Ask Date: 2007/07/18

Dr. He Shenglong reply Pediatrics


Hello: In terms of color, a baby's stool that is yellow or green is considered normal; pale yellow or grayish-white is abnormal.
You can refer to the color chart in the children's health handbook for images and descriptions of infant stool colors.
If the stool is slightly watery, you can continue to observe it, but if there is more severe diarrhea or if it is accompanied by other symptoms, you should consult a physician.
Currently, you need to pay attention to the disinfection and hygiene of the utensils used for preparing formula (including bottles).
Thank you for your message!

Reply Date: 2007/07/18

More Info


When it comes to the color and consistency of your baby's stool, it can be quite concerning for parents, especially when they notice changes. In your case, your 2-month-old daughter has transitioned from golden yellow stools to a mix of dark green and yellow, with some watery consistency. This can understandably raise questions about whether this is normal or if there is an underlying issue.

Firstly, it is important to note that the color of an infant's stool can vary significantly based on several factors, including diet, the type of formula being used, and the baby's digestive system. In infants who are exclusively breastfed, stools are typically yellow and seedy. However, formula-fed babies may have stools that range from yellow to brown and even green. The green color can often be attributed to the iron content in the formula, as iron is not always fully absorbed by the body and can be excreted in the stool, leading to a greenish hue.

In your situation, the fact that the stool has changed color after opening a new can of formula is noteworthy. Different formulas can have varying compositions, including different levels of iron and other nutrients, which can affect stool color. If the new formula has a higher iron content or different ingredients, it could explain the change in your baby's stool color. Additionally, the presence of both green and yellow in the stool is not uncommon and can indicate that the baby is digesting the formula but may not be fully absorbing all components.

The watery consistency of the stool is also something to monitor. While some variability in stool consistency is normal, especially as babies adjust to new formulas or foods, consistently watery stools could indicate diarrhea. If your baby is experiencing diarrhea, it's essential to ensure she stays hydrated, as infants can become dehydrated quickly. Look for signs of dehydration, such as decreased urine output, dry mouth, or lethargy.

Another important aspect to consider is the overall health and behavior of your baby. If she is feeding well, gaining weight appropriately, and is generally happy and active, the changes in stool color and consistency may not be a cause for concern. However, if you notice any additional symptoms such as fever, vomiting, or signs of discomfort, it would be prudent to consult your pediatrician.

In summary, the green stool you are observing in your baby is likely a normal variation, especially considering the recent change in formula. However, keep an eye on the consistency and any other symptoms. If you have any doubts or if the stool remains consistently watery, it is always best to reach out to your healthcare provider for personalized advice and reassurance. They can provide guidance based on a thorough assessment of your baby's health and dietary needs.

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