Keeping Little Ones Hydrated: A Guide to Ensuring Adequate Water Intake for Infants


Importance of Water Intake for Infants

Water is essential for everyone, but for infants, it is even more crucial as their bodies are still developing and growing. Adequate water intake supports proper physical and cognitive development, ensures good overall health, and helps prevent various illnesses. Although breastmilk or formula provides most of the hydration needs for infants, it is still vital to introduce water at the appropriate time, in the right amounts. In this article, we will discuss the importance of water intake for infants and provide useful information on how to incorporate it into their daily routine.

How much water do infants need?

Unlike adults, infants do not have a well-developed thirst reflex and are unable to communicate their need for water. Therefore, it is the responsibility of caregivers to ensure that infants receive adequate water intake throughout the day. The amount of water an infant needs varies based on age and weight. According to the American Academy of Pediatrics (AAP), exclusively breastfed infants do not need additional water intake for the first six months of life. However, formula-fed infants may need a few ounces of water each day, depending on their age and weight.

For example, a newborn weighing 6-9 pounds needs about 20 ounces of fluid a day, which includes breast milk or formula. As the baby grows, the amount of fluids needed also increases. By the time they are six months old, they need about 28 ounces of fluid a day. At one year, that amount goes up to about 32 ounces. It is essential to note that these are guidelines, and the best way to determine your baby’s water needs is by consulting with their pediatrician.

Signs of Dehydration in Infants

It is crucial to monitor your baby’s water intake to ensure they are adequately hydrated. Infants do not sweat like adults; therefore, their bodies lose water mostly through urine, bowel movements, and breathing. Dehydration can happen quickly, and some signs to watch out for include:

  • Dry mouth and cracked lips
  • Little or no urine output
  • Absence of tears when crying
  • Pale or yellowish skin
  • Dark-colored urine
  • Fussiness and irritability
  • Extreme sleepiness or lethargy

It is essential to seek medical attention if your infant is showing any of these symptoms.

Introducing Water to Infants

As mentioned earlier, exclusively breastfed infants do not need additional water until they are six months old. The AAP also advises introducing water to formula-fed infants gradually after four months. It is best to use sterilized or filtered water and to offer it in a sippy cup or a bottle with a soft spout. Avoid giving water in a bottle with a nipple, as this can lead to tooth decay. It is also crucial to limit the amount of water they drink at once to prevent them from filling up on it and not receiving the necessary nutrients from breastmilk or formula. It is best to offer water in between feedings or meals and during hot weather to avoid dehydration.

Benefits of Water Intake for Infants

Water is necessary for various bodily functions, and for infants, it serves more than just hydration purposes. Below are some of the benefits of adequate water intake for infants:

  • Regulates body temperature: Infants are not able to regulate their body temperature as efficiently as adults, and water helps them stay cool during hot weather.
  • Promotes digestion: Water helps with bowel movements, reducing the risk of constipation in infants. It also supports the absorption of nutrients from breastmilk or formula.
  • Prevents urinary tract infections: Adequate water intake helps flush out bacteria from the urinary tract, reducing the risk of urinary tract infections.
  • Supports healthy kidneys: Water is essential for proper kidney function, and ensuring that infants drink enough water can help prevent kidney-related illnesses in the future.
  • Promotes healthy teeth development: Drinking water after feedings helps wash away milk or formula that may lead to tooth decay.


In conclusion, water intake is crucial for an infant’s overall health. It is essential to introduce water at the right time, in the appropriate amounts, and monitor its intake to ensure hydration levels remain optimal. Remember to consult with a pediatrician for personalized recommendations and always prioritize breastmilk or formula as the primary source of nutrition for infants. With proper water intake, you can help your little one grow and thrive into a healthy and happy individual!


The information provided in this article is not a substitute for professional medical advice. It is essential to consult with a pediatrician for personalized recommendations on water intake for infants.

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