One hot summer afternoon, when my first child had just hit the five-month mark, I was out running errands with my mother. Despite knowing that my baby was exclusively breastfed, she figured he might be thirsty in the heat and attempted to offer him some water from her bottle. Instinctively, I exclaimed “NO!” and quickly took the bottle away. I had heard somewhere that breastfed infants don’t require additional water, and I was sure my milk provided all the hydration he needed. The ample supply and his wet diapers, even in the sweltering heat, confirmed my thoughts. Yet, was there more to my instinctive hesitation?
Curiosity led me to conduct some research when I got home (isn’t that what we all do when faced with parenting dilemmas?). I discovered that my instincts were spot on. Infants who are not yet eating solid food should not be given supplemental water, whether they are breastfed or formula-fed. According to the Academy of American Pediatrics, “Healthy babies do not need extra water. Breast milk, formula, or both provide all the fluids they need.”
This advice is particularly pertinent for young babies, whose bodies are not designed to process anything besides milk. Furthermore, offering any kind of supplement can disrupt the natural milk supply. The Academy of Breastfeeding Medicine warns that “Supplementation in the first few days interferes with the normal frequency of breastfeeding,” potentially leading to complications like increased bilirubin levels, weight loss, prolonged hospital stays, and even water intoxication.
It’s essential to be cautious with any baby under 4 to 6 months who hasn’t yet started solids. While some pediatricians suggest that formula-fed babies might receive water during hot weather, this should be approached very carefully. Excessive water intake can actually pose serious health risks for infants.
As Dr. James P. Keating, a pediatrician and retired medical director at St. Louis Children’s Hospital, explains, too much water can disrupt a baby’s sodium balance, leading to severe conditions such as seizures, comas, brain damage, or even death. If you feel it necessary to offer your baby water, Dr. Keating advises limiting it to just two to three ounces at a time and only after they have been breastfed or have had formula.
Interestingly, he also discourages swimming lessons for infants, as repeated immersion can lead them to swallow excess water, which has resulted in seizures in some cases. It’s critical to be aware that while we don’t need to restrict our infants from every droplet of water, we should certainly be vigilant about the amounts they consume.
Once babies reach the stage of eating solids, it’s recommended to introduce water alongside their meals (but not juice!). Water can help with digestion, and as their solid food intake increases, they will need to replace some of the fluids that breastfeeding or formula may no longer fully provide.
In the early months, however, breast milk or formula is all a baby requires, even during hot weather. So the next time someone—like a well-meaning grandparent—tries to offer your infant a bottle of water, you can confidently say, “No thanks!” Your little one doesn’t need any additional water at this stage, despite what others may think.
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Summary:
Breastfed and formula-fed infants should not be given water until they are six months old. Milk provides all the hydration they need, and introducing water too early can lead to serious health issues, including water intoxication. Once babies start eating solids, small amounts of water can then be introduced to aid digestion.