Bigger Brain Volume, Better Function

A 2022 study—widely discussed in subsequent years—found that adults with higher levels of omega-3 fatty acids had notably larger brain volumes. In particular, the hippocampus, the region responsible for memory formation and learning, was significantly larger in those with elevated omega-3 status. Participants in the top 25% for omega-3 levels showed greater total brain volume and hippocampal size compared to those in the lowest quartile.

The implications are substantial. Researchers observed that individuals with lower omega-3 levels exhibited brain characteristics equivalent to approximately two additional years of structural aging. In contrast, higher levels appeared to help preserve brain integrity.

Cognitive Benefits: Memory and Executive Function

Beyond physical brain structure, omega-3s are also associated with enhanced cognitive performance. Individuals with higher levels demonstrated stronger visual memory and improved executive function—skills that include problem-solving, planning, and attention control.

These findings reinforce the idea that omega-3 fatty acids, particularly DHA and EPA, play a functional role in maintaining mental sharpness as we age.

Reducing the Risk of Cognitive Decline

Long-term studies and meta-analyses further suggest that regular, moderate intake of omega-3s may reduce the risk of cognitive decline and dementia by around 20%. While not a cure, omega-3s appear to offer a protective effect, especially when consumed consistently over time.

Importantly, the timing of intake matters. Maintaining adequate omega-3 levels during midlife has been identified as a key factor in preserving brain structure and reducing the likelihood of dementia later on.

Prevention, Not Cure

Researchers emphasise that omega-3s are most effective as a preventive strategy rather than a treatment. Their benefits are most pronounced before significant cognitive decline occurs or in the earliest stages of impairment. This positions omega-3 intake as a proactive measure—something to prioritise well before symptoms arise.

Diet Matters: Supporting Evidence

Supporting this perspective, research published in the American Journal of Clinical Nutrition in 2026 found that individuals with higher adherence to the MIND diet—a dietary pattern rich in brain-supportive nutrients including healthy fats—experienced slower grey matter shrinkage. The effect was equivalent to delaying brain aging by approximately 2.5 years.

Where to Get Omega-3s

The most beneficial omega-3 fatty acids for brain health—EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid)—are primarily found in oily fish such as salmon, mackerel, and sardines, as well as in high-quality fish oil supplements such as Equazen.

Conclusion

The science is increasingly clear: omega-3 fatty acids are a valuable ally in maintaining brain health. From preserving brain volume to supporting memory and potentially reducing the risk of dementia, their role is both structural and functional.

Incorporating omega-3s into your diet—particularly during midlife—may be one of the simplest and most effective steps you can take to support cognitive longevity.

References

• Research published in Neurology, the medical journal of the American Academy of Neurology
• The American Journal of Clinical Nutrition

Omega-3s are vital building blocks in the body, especially in the brain and eyes. In fact, DHA is a key structural component of the retina, helping to support healthy vision throughout life. Diets rich in omega-3s have been linked to better eye health and a reduced risk of age-related decline, making them an important addition to everyday nutrition.

When it comes to joint health, fish oils are widely recognised for their anti-inflammatory properties. By helping to regulate inflammation, omega-3s can support mobility and ease stiffness—particularly beneficial for those experiencing joint discomfort or leading active lifestyles.

Perhaps most compelling is the growing body of research around brain health. Studies suggest that regular intake of omega-3 fatty acids may be associated with a lower risk of cognitive decline and dementia, particularly when consumed consistently over time [1]. Omega-3s are also known to support memory, focus and overall mental performance by contributing to healthy brain cell function [2].

While diet is always the foundation, supplementation can help bridge nutritional gaps—especially for those who don’t consume enough oily fish. This is where specialised formulations such as Equazen (previously known as Eye Q) stand out. With a scientifically balanced ratio of omega-3 and omega-6 fatty acids, Equazen is designed to support brain function, learning, behaviour and eye health in both children and adults.

The takeaway is simple: fish oils are not just a trend—they are a valuable tool in supporting long-term wellbeing. With the right balance and consistent use, they can play a meaningful role in helping you stay sharp, active and healthy at every stage of life.

References

• “Vision problems. Joint pain. Dementia… Is there anything fish oils can’t beat?” Daily Mail. Available at: https://www.dailymail.co.uk/health/article-2835873/Vision-problems-Joint-pain-Dementia-fish-oils-t-beat.html
• [1] “Associations of fish oil supplementation with incident dementia: Evidence from the UK Biobank cohort study” National Library of Medicine. Available at https://pubmed.ncbi.nlm.nih.gov/36161159/
• [2] “How Omega-3 Fish Oil Affects Your Brain and Mental Health” Healthline, written by Keith Pearson PhD, RD. Available at https://www.healthline.com/nutrition/omega-3-fish-oil-for-brain-health?

Blindness, caused by diseases such as diabetes and age-related macular degeneration, affects millions of people worldwide. The study suggests that incorporating a fish oil supplement into daily routines may help lower the risk of vision loss and slow down the progression of these diseases. Fish oil supplements, like Equazen (previously called Eye Q), contain a well-researched combination of fish and evening primrose oils [1]. These supplements offer a specific ratio of omega-3 and omega-6 fatty acids, which have shown potential in maintaining healthy vision and preventing eye-related disorders.

Omega-3 fatty acids, specifically eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), are known for their anti-inflammatory properties and various health benefits, including improving cardiovascular health and supporting brain function. The study emphasizes their potential in targeting inflammation and treating diseases that lead to blindness.

While the findings of this study are promising, further research is necessary to confirm their effectiveness and determine the optimal dosage of omega-3 fatty acids for treating blindness. It is important for individuals to consult with healthcare professionals before incorporating new supplements into their routines, especially if they have existing medical conditions or are taking other medications.

The potential of fish oil supplements in treating diabetes and age-related macular degeneration offers hope for individuals at risk of vision loss and those already affected by these conditions. This development highlights the importance of a balanced diet and healthy lifestyle choices in maintaining good eye health and may lead to alternative treatments for blindness.

References

• [1] “World’s leading cause of blindness could be treated with a new fish oil pill, study claims.” Daily Mail. Available at: https://www.dailymail.co.uk/health/article-11908715/Worlds-leading-cause-blindness-treated-new-fish-oil-pill-study-claims.html?ito=email_share_article-top

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/