Does sugar make kids hyperactive?

• A 2024 Korean cohort study found children consuming ≥200 mL/day sugar‑sweetened beverages at 24 months had a higher incidence of ADHD over 9 years (adjusted hazard ratio 1.17).
• An experimental study reported increased inattention on a performance task after sugar in children with ADHD, although hyperactivity and aggression did not rise and clinical significance was questioned.
• Some reviews note they cannot completely rule out small effects of sugar on behavior or effects in specific susceptible subgroups of children.

• A 23‑trial JAMA meta‑analysis found no demonstrable effect of sugar on children’s behavior or cognition, with overall effect size on hyperactivity near zero.
• American Academy of Pediatrics–affiliated guidance reports that even very high sugar intake did not change behavior or concentration, including in children labeled “sugar sensitive.”
• FAO’s review and expert commentary state there is little objective evidence that sugar significantly alters children’s behavior, and major pediatric experts call the sugar–hyperactivity link a myth.
• Longitudinal studies show no association between persistent high sugar intake in childhood and later ADHD incidence, suggesting high sugar consumption in ADHD may be a consequence rather than a cause.

High‑quality randomized trials and major reviews converge that sugar does not make children acutely hyperactive, and pediatric bodies describe the sugar–hyperactivity link as a myth. Some observational data and small subgroup findings leave open the possibility of modest or indirect effects in specific children, but these do not overturn the overall null result.