Many people grew up hearing that fish is “brain food.” Modern research suggests this idea may have a biological basis, as omega-3 fatty acids, particularly docosahexaenoic acid (DHA), play important structural and functional roles in the brain. Omega-3 fatty acids have been studied for their potential influence on cognition, mood, learning, child development, and attention-related conditions.

Omega-3 Status, Learning, and ADHD

Research published in the Journal of Child Health Care (e-published August 9, 2011; doi:10.1177/1367493511403953) examined omega-3 fatty acid status in children diagnosed with attention-deficit/hyperactivity disorder (ADHD), including a subgroup with both ADHD and learning disabilities.

The researchers found that children with learning difficulties tended to have lower levels of DHA compared with children without learning difficulties. Omega-3 fatty acid levels were measured in red blood cell membranes, a marker often used to reflect longer-term fatty acid status.

Children with higher DHA levels:

  • Reported less anxiety

  • Demonstrated better word recall

  • Showed stronger reading and spelling performance

In contrast, higher relative levels of omega-6 fatty acids were associated with less favorable cognitive and emotional measures.

Omega-3 Fatty Acids, Learning, and Behavior

Earlier research published in Physiology & Behavior (1996; 59(4–5):915–920) evaluated 96 boys aged 6 to 12 years, examining the relationship between omega-3 fatty acid levels, learning ability, and behavior.

The study found that lower omega-3 fatty acid levels were associated with:

  • Learning difficulties

  • Behavioral challenges

  • Increased general health complaints

Interestingly, the researchers also noted that children with lower essential fatty acid status experienced more frequent colds and greater antibiotic use, suggesting a possible relationship between fatty acid balance and immune function.

Context

DHA is a major structural component of neuronal membranes and is involved in synaptic signaling, neurotransmitter function, and neurodevelopment. These studies suggest that omega-3 fatty acid status—particularly DHA—may be linked with learning, emotional regulation, and overall brain function in children.

While these findings do not establish causation, they add to a growing body of research indicating that fatty acid balance may influence neurological and behavioral outcomes, especially during critical periods of brain development.