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Should my 2½-month-old be drinking water?
Q: My 2½-month-old daughter refuses to drink water. I have been told that water is very good for her, but how can I get her to it?
A: Jessica, thanks for your question about giving water to young infants. Some people think water is good for babies, but experts say young infants should have only breastmilk or formula, not water. Your baby seems to naturally know this. At 2 ½-months-old, she’s growing rapidly and needs all the nutrition and calories she can get from breastmilk or formula. If you gave her water, it would fill up her stomach with no nutrition, and then she wouldn’t have any appetite left for the milk that she needs.

It’s best to hold off giving your daughter water until she can sip it from a cup. Water is good for older children and adults to drink, but not for young babies.