Reviewed by Jessie, BSc Biomedical Science · Formulation Lead, Purest Kids
The infancy narrative
Omega-3 supplementation in the first 1,000 days of life — pregnancy through age 2 — gets the most research attention. DHA's role in early brain formation is well established. But the conversation often stalls there, as though a child's DHA needs end when they start school. They do not.
What the research shows in school-aged children
Studies conducted in children aged 7–12 have found associations between omega-3 status and academic performance measures. Research published in PLOS ONE found that DHA supplementation in underperforming school-aged children was associated with improvements in reading, working memory, and behaviour. A separate study in children with dyslexia found measurable improvements in reading and spelling after omega-3 supplementation.
The mechanism involves DHA's ongoing role in synaptic membrane function. Even after the rapid growth phase of infancy, neurons continue to require DHA to maintain optimal membrane fluidity and signalling efficiency.
Executive function and the school years
The prefrontal cortex — responsible for executive function, planning, sustained attention, and impulse control — is not fully developed until early adulthood. During the school years, it is in active development. DHA is concentrated in prefrontal cortex tissue. The growing academic and attentional demands of school years make adequate DHA more relevant, not less.
The consistent intake point
The studies that show cognitive benefits from omega-3 supplementation in school-aged children used daily supplementation over periods of weeks to months. These are not acute effects — they are accumulative. The case for a daily supplement through the school years, not just in infancy, is well supported.
Omega-3 Mango Burstlets — daily DHA for children aged 3–12 and beyond →
References
- Richardson AJ, et al. "Docosahexaenoic acid for reading, cognition and behavior in children aged 7-9 years: a randomised controlled trial." PLOS ONE, 2012.
- Montgomery P, et al. "Docosahexaenoic acid supplementation in children with ADHD." PLOS ONE, 2013.