Cognitive effects of polyunsaturated fatty acids in children with attention deficit hyperactivity disorder symptoms:

N Sinn1, J Bryan, C Wilson

  • 1Nutritional Physiology Research Centre, University of South Australia, Adelaide, SA 5001, Australia. natalie.sinn@unisa.edu.au

Insights

Polyunsaturated fatty acid (PUFA) supplementation improved attention control in children with ADHD symptoms. These cognitive gains correlated with reduced inattention and hyperactivity, suggesting a shared neurological pathway.

Area of Science:

  • Neuroscience
  • Nutritional Psychiatry
  • Developmental Psychology

Background:

  • Attention-Deficit/Hyperactivity Disorder (ADHD) is a neurodevelopmental disorder characterized by inattention, hyperactivity, and impulsivity.
  • Cognitive deficits, particularly in executive functions like attention control, are common in children with ADHD.
  • Dietary factors, including polyunsaturated fatty acids (PUFAs) and micronutrients, are being explored for their potential role in managing ADHD symptoms.

Purpose of the Study:

  • To investigate the effects of polyunsaturated fatty acid (PUFA) and micronutrient supplementation on cognitive function in children exhibiting ADHD symptoms.
  • To determine if supplementation impacts specific cognitive domains related to attention and executive control.
  • To explore the relationship between cognitive improvements and behavioral symptoms of ADHD.

Main Methods:

  • A randomized controlled trial involving children aged 7-12 years with ADHD symptoms.
  • Participants received either PUFA, PUFA plus multivitamins/minerals (MVM), or a placebo for 15 weeks.
  • Following the initial phase, all children received PUFA+MVM for an additional 15 weeks.

Main Results:

  • Significant improvements in attention control (Creature Counting task) were observed in children receiving PUFA compared to placebo after 15 weeks (p=0.002).
  • This attention improvement was replicated when the placebo group subsequently received PUFA.
  • No significant cognitive improvements were noted with additional micronutrient supplementation or in other cognitive measures.

Conclusions:

  • PUFA supplementation shows promise in enhancing attention control in children with ADHD symptoms.
  • Cognitive performance improvements mediated parent-reported reductions in inattention, hyperactivity, and impulsivity.
  • These findings suggest a potential common neurological mechanism underlying both cognitive and behavioral ADHD symptoms, responsive to PUFA intervention.