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🍽️ Nutrition and Constipation

The Importance of Water Consumption

2 min read · Clinician-reviewed

Adequate fluid intake, especially water, is essential for maintaining soft, regular bowel movements and preventing constipation. Water works together with dietary fiber to keep the digestive system running smoothly. When the body is dehydrated, it tries to conserve water by absorbing more of it from the colon, which can result in hard, dry stools that are difficult to pass.

How Water Helps Prevent Constipation

Fiber and water have a synergistic relationship in the gut. Fiber acts like a sponge, absorbing water to add bulk and softness to the stool. Without enough water, increasing fiber intake can sometimes make constipation worse by creating a bulky, hard mass in the colon. Therefore, it is crucial to increase fluid intake whenever you increase fiber in your child's diet.

While there is no magic amount of water that will cure constipation, ensuring your child is well-hydrated throughout the day is a key part of any treatment or prevention plan. The European Society for Paediatric Gastroenterology, Hepatology and Nutrition (ESPGHAN) and the North American Society for Pediatric Gastroenterology, Hepatology and Nutrition (NASPGHAN) guidelines recommend a normal daily fluid intake for children with functional constipation, although they note that there is limited evidence to support increasing fluids above normal daily requirements.

How Much Water Does a Child Need?

The amount of water a child needs depends on their age, activity level, and the climate. A general guideline is:

  • Toddlers: About 4 cups per day (water or milk)
  • Children 4-8 years: About 5 cups per day
  • Older children: 7 to 8 cups per day

These amounts can come from various sources, but water is the best choice as it is free of sugar and calories. While other fluids like juice and milk contribute to hydration, water should be the primary beverage, especially between meals.

References

  1. 1. Tabbers MM, DiLorenzo C, Berger MY, et al. Evaluation and Treatment of Functional Constipation in Infants and Children: Evidence-Based Recommendations From ESPGHAN and NASPGHAN. J Pediatr Gastroenterol Nutr. 2014;58(2):258–274. doi:10.1097/MPG.0000000000000266
  2. 2. Boilesen SN, Tahan S, Dias FC, Melli L, de Morais MB. Water and fluid intake in the prevention and treatment of functional constipation in children and adolescents: is there evidence? J Pediatr (Rio J). 2017;93(4):320-327. doi:10.1016/j.jped.2017.01.003
  3. 3. Healthy Drinks. HealthyChildren.org. Accessed October 27, 2025. https://www.healthychildren.org/English/healthy-living/nutrition/Pages/Healthy-Drinks.aspx