03/17/2026
A study of 217,000 adults aged 40–64 found that people with higher blood levels of omega-3 fatty acids had a lower risk of developing early-onset dementia (before age 65).
Over about 8 years, those with the highest omega-3 levels had ~35–40% lower risk compared to those with the lowest levels.
Omega-3 fats, especially DHA and EPA, are important for brain cell structure and may support brain health through anti-inflammatory and neuroprotective effects.
This study shows an association, not cause and effect, but it adds to growing evidence that nutrition and lifestyle may influence long-term brain health.
Sources of omega-3:
• Fatty fish (salmon, sardines, mackerel)
• Walnuts
• Flax and chia seeds
• Fish oil or algae-based supplements