In general, it is not advisable to let baby drink water until he is about 6 months old. The reason is he can gets all the hydration that he need from breast milk as it contains approximately 87.5% water.
If let baby drink too much water within first 6 months, this may bring negative effects to him. It can interfere with his body’s ability to absorb the nutrients in breast milk or formula. It can also cause his tummy to feel full, which curbs his desire to feed. A baby who drinks too much water can develop a condition known as water intoxication, which can cause seizures and even a coma. Water intoxication happens when too much water dilutes the concentration of sodium in the body, upsetting the electrolyte balance and causing tissues to swell.
When providing formula to baby, parents should follow the instruction of the packaging carefully and use the recommended amount of water. Adding too much water, not only he may take fewer nutrients that he needs from formula, he may in risk of water intoxication as well.
Once baby is 6 months old, it is fine to give him sips of water when he is thirsty. However, should not over do it. After his first birthday, when he start to eat solids and drink whole milk, we can let him drink as much water as he likes.
