Looked it up and this is what I found -
âWater fills up little tummies
One of the reasons water is such a perfect drink for big people is that it provides the hydration your body needs without any extra calories.
But babies need those calories. They need the nutrition they get from breast milk and formula. When you give a baby water, it takes up valuable real estate in their itty-bitty belly. For context, a 1-month-oldâs stomach is about the size of an egg. It fills up fast.
Giving your baby water means less room for breast milk and formula, which contain the vitamins, minerals and proteins babies need for healthy growth and development.
âGiving babies water dilutes their calorie intake,â Dr. Buckingham clarifies. âProper weight gain is such an important indication of your babyâs health in those first few months. We want them to be getting those calories.â
Risk of water intoxication
Even more importantly, giving babies water can throw off the delicate sodium balance in their bodies, which can be very dangerous.
âWhen you give a baby water, it can dilute the sodium in their bloodstream. That can cause a condition called hyponatremia, or what some people may call âwater intoxication,ââ Dr. Buckingham says.
Water âŚ. intoxication? Yes. Thatâs a real thing. And it can be very dangerous. Letâs break down how it happens.
Among other things, your kidneys help remove excess fluid by filtering it into your bladder (aka, allowing you to pee it out). That essentially keeps your system from flooding with water.
Adult kidneys are about the size of a large avocado, so healthy, grownup kidneys can typically keep up with removing any extra fluids we take in.
Newborn kidneys, on the other hand, are about the size of a grape. So, itâs easier for your babyâs kidneys to get overwhelmed. And it doesnât take much for your babyâs body to get more water than it can handle.
When a babyâs (or adultâs) body is overloaded with water, it can begin to dilute their blood. Thatâs when things get dangerous. Because waterlogged blood lowers the sodium content in your body.
When your babyâs sodium content goes too low because of taking in too much water, it can lead to serious symptoms, like seizures and even coma and permanent brain damage.
When can babies have water?
Typically around the time your baby is 6 months oldâ