Caffeine Linked to Brain and Sleep Changes in Children
A recent study of nearly 10,000 children finds associations between caffeine intake and altered brain development and sleep.
Updated on Oct. 20, 2026 in Children’s Health
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A study published in Biological Psychiatry: Cognitive Neuroscience and Neuroimaging reveals that caffeine consumption in children aged 9 to 11 is linked to reduced brain cortex surface area. Higher intake levels were also associated with shorter sleep duration and increased behavioral problems.
Why it matters
The findings suggest that even modest caffeine consumption may influence neurological development and mental health outcomes in pre-teens. Researchers believe the link to behavior and mood may be mediated by the loss of consistent sleep.
Researchers observed reduced cortex surface area across 22 brain regions among children with higher caffeine intake. The study analyzed data from 9,632 children, noting that 60% of the caffeinated drinks consumed were sodas.
The players
ABCD Study
This is a large-scale, long-term research project that tracks brain development and health in children across the United States.
Biological Psychiatry: Cognitive Neuroscience and Neuroimaging
This is a peer-reviewed scientific journal that publishes research on the intersection of brain structure and mental health.
The details
Using MRI scans, investigators analyzed cortex thickness and surface area while adjusting for factors like family income and parental education. Six months after initial scans, children who consumed more caffeine reported increased attention, mood, and behavior issues.
Timeline
The study was published on October 20, 2026.
Mental health problems were reported six months after initial brain scans.
Observations regarding brain surface area occurred 18 months after scans.
The Big Picture
This study utilizes data from the ABCD Study to track long-term health, offering a longitudinal perspective on pediatric brain development. It marks a significant shift in understanding how common dietary stimulants might affect the neurobiology of growing children.
Parents should be aware that regular caffeine consumption in children may be linked to decreased sleep quality and potential mood or behavior shifts. These findings encourage families to monitor children's intake of common sources like soda and caffeinated beverages.
The takeaway
Limiting caffeine intake in pre-teens could support better sleep hygiene and overall emotional well-being. Focusing on non-caffeinated alternatives may help minimize risks to developing brain regions identified in this research.
What happens next
Researchers intend to conduct further studies using more precise measures of drink types, timing, and sleep duration, and plan to investigate the independent role of sugar in brain development outcomes.
Further reading
Learn more about adolescent development at the Children’s Health section.
Live Poll
Do you believe parents should strictly limit caffeinated drinks like soda for their school-aged children?
