Marine Omega-3s, Brain Development and Behaviour: What the Research Says

Long-chain marine omega-3 fatty acids, especially DHA and EPA, are closely linked with brain development, eye health, mood regulation and behaviour. This research overview summarises key findings from a published review on marine omega-3s and brain-related outcomes.

Key points

  • DHA is an important structural component of the brain and retina.
  • Marine omega-3s are discussed in relation to early development, attention, behaviour and mood.
  • The research supports omega-3 intake as part of a broader healthy diet and lifestyle.

DHA is a major structural fatty acid in the brain and retina. It contributes to cell membrane fluidity, neurotransmitter function and healthy signalling between brain cells.

The review highlights that modern diets are often much higher in omega-6 fats and lower in marine omega-3s than traditional diets. This imbalance may reduce the body’s ability to maintain optimal omega-3 status.

Early childhood development

During pregnancy, infancy and early childhood, DHA is especially important because the brain and eyes are developing rapidly. The review notes that DHA accumulation is particularly important in late pregnancy and the first months after birth.

Attention, learning and behaviour

The article discusses research involving children with attention, learning and behavioural challenges, including ADHD-type symptoms, dyspraxia/developmental coordination disorder and autism spectrum disorder. Several studies reviewed reported improvements in attention, behaviour, reading or related outcomes after supplementation with marine omega-3s or omega-3/omega-6 combinations.

Mood and cognitive health

The review also covers evidence linking low omega-3 levels with mood disorders, including depression and anxiety-related outcomes. Marine omega-3s may support brain health through anti-inflammatory effects, improved membrane function and neurotransmitter signalling.

What this means for everyday nutrition

For people who do not regularly eat oily fish, a quality omega-3 supplement may help bridge nutritional gaps. Equazen combines fish oil and evening primrose oil in a balanced omega-3 and omega-6 formulation designed to support learning, behaviour and brain health.

Important note

This article is educational and should not be taken as medical advice. Anyone managing a medical condition, taking medication, pregnant, breastfeeding or considering supplements for a child should speak with a qualified healthcare professional.

References

  • DiNicolantonio JJ, O’Keefe JH. The Importance of Marine Omega-3s for Brain Development and the Prevention and Treatment of Behavior, Mood, and Other Brain Disorders. Nutrients. 2020;12(8):2333. PMCID: PMC7468918.
  • National Library of Medicine / PubMed Central: https://pmc.ncbi.nlm.nih.gov/articles/PMC7468918/