Early ultra-processed foods consumption and hyperactivity/inattention in adolescence.

Objective: To investigate the relationship between childhood consumption of ultra-processed foods and symptoms of hyperactivity/inattention in adolescents from São Leopoldo, a city in southern Brazil.

Methods: Data were collected at four distinct stages: when participants were 12-16 months old in 2001 and 2002 and later when they were 3-4, 7-8, and 12-13 years old. During the interview at 12-16 months, mothers were asked about the introduction of sugar in their child's diet. Two 24-hour recall surveys were conducted with children aged 3-4, 7-8, and 12-13 years to assess their consumption of ultra-processed foods. At the age of 12-13 years, the participants completed the Hyperactivity/Inattention subscale of the Strengths and Difficulties Questionnaire (SDQ), which screens for mental health problems.

Results: Among the 173 adolescents, 22.5% exhibited hyperactivity symptoms. The consumption of ultra-processed foods in grams, kilocalories, and as a percentage of energy intake at 3-4 years old were found to be predictors of hyperactivity/inattention symptoms (RR: 0.81, 95%CI: 0.69-0.95; RR: 1.01, 95%CI: 1.00-1.02; RR: 1.02, 95%CI:1.01-1.02; RR: 1.25, 95%CI:1.04-1.51, respectively).

Conclusion: The consumption of ultra-processed foods at an early age was associated with hyperactivity and inattention symptoms in adolescence.