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Hydration in Children: What Do We Know and Why Does it Matter?

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Many children lack adequate fluid intake, with 60% not meeting water intake recommendations. Poor hydration, especially at school, may impact cognitive performance, highlighting the need for better water consumption strategies.

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Area of Science:

  • Pediatric Nutrition
  • Public Health
  • Hydration Science

Background:

  • Adequate fluid intake and hydration are crucial for children's physiological health and establishing lifelong healthy drinking habits.
  • The Liq.In7 surveys revealed that 60% of children (4-17 years) across 13 countries did not meet the European Food Safety Authority (EFSA) adequate water intake from fluids.
  • The quality of fluid intake is also a concern, with sugar-sweetened beverages and fruit juices contributing more to total fluid intake than water in 6 out of 13 countries.

Purpose of the Study:

  • To assess the adequacy of fluid intake in children.
  • To investigate the relationship between fluid intake, hydration status, and cognitive performance.
  • To identify barriers to water consumption at school and propose interventions.

Main Methods:

  • Cross-sectional surveys (Liq.In7) involving 6,469 children aged 4-17 years from 13 countries.
  • Assessment of fluid intake quantity and quality, including contributions from various beverage types.
  • Utilized urinary biomarkers (urine osmolality, specific gravity, color) to evaluate hydration status.

Main Results:

  • A significant proportion of children (60%) failed to meet recommended water intake levels.
  • Urinary biomarker data suggest many children exhibit signs of insufficient fluid intake (highly concentrated urine).
  • Children consumed only 14% of their total fluid intake at school, a critical period for cognitive function.

Conclusions:

  • Insufficient fluid intake and suboptimal hydration are prevalent in children, potentially affecting cognitive performance.
  • There is a critical need to address barriers to water consumption in schools.
  • Multicomponent interventions combining educational, environmental, and behavioral strategies are recommended to promote adequate hydration and support children's cognition.