At what age can infants start drinking water?

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Last updated: April 10, 2025View editorial policy

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From the Guidelines

Children can start drinking small amounts of plain water at around 6 months of age, but according to the most recent and relevant guidelines, if a child is not being breast-fed and is less than 12 months of age, 100-200 mL of clean, plain water should be given as needed, as stated in the study 1. When introducing water to children, it is essential to consider their age, activity level, and overall diet.

  • Before 6 months, exclusively breastfed or formula-fed infants get all the hydration they need from breast milk or formula, and additional water is unnecessary and potentially harmful as it can fill their small stomachs and interfere with proper nutrition.
  • At 6 months, start with just 2-4 ounces (60-120 ml) per day in a sippy cup or small open cup to help them learn drinking skills.
  • As children grow older, gradually increase water intake based on their activity level, climate, and overall diet.
  • Water is essential for maintaining proper hydration, supporting bodily functions, and developing healthy drinking habits.
  • Always consult with your pediatrician about specific recommendations for your child, especially if you have concerns about hydration or if your child has any medical conditions, as the study 1 provides general guidance but may not address individual needs.

From the Research

Age for Children to Start Drinking Water

There is no specific evidence in the provided studies that directly answers the question of what age children can start drinking water.

  • The studies focus on dehydration, oral rehydration therapy, and fluid intake in older adults or patients with acute diarrhea, but do not provide information on the appropriate age for children to start drinking water 2, 3, 4, 5.
  • None of the studies mention the introduction of water to children's diets or the recommended age for this introduction.
  • The studies discuss oral rehydration solutions and their efficacy in treating dehydration, but do not address the question of when children can start drinking plain water 3, 5.

References

Guideline

Guideline Directed Topic Overview

Dr.Oracle Medical Advisory Board & Editors, 2025

Research

Maintaining oral hydration in older adults: a systematic review.

International journal of nursing practice, 2003

Research

Principles and Practice of Oral Rehydration.

Current gastroenterology reports, 2019

Professional Medical Disclaimer

This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Dr.Oracle assumes no liability for clinical decisions based on this content.

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