Does eating fish help older brains stay sharp?
APOE ε4 and the associations of seafood and long-chain omega-3 fatty acids with cognitive decline
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
This study looked at whether eating seafood or taking fish oil helps older people keep their memory and thinking skills as they age, especially if they have a gene that makes them more likely to get memory problems.
Surprising Findings
Fish oil supplements helped cognitive decline regardless of APOE ε4 status, while dietary omega-3s only helped carriers.
People assume food sources are always better than supplements—but here, supplements worked universally, while food only worked for a genetic subgroup.
Practical Takeaways
If you're over 65 and have a family history of dementia, aim for one seafood meal per week—especially fatty fish like salmon or sardines.
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
This study looked at whether eating seafood or taking fish oil helps older people keep their memory and thinking skills as they age, especially if they have a gene that makes them more likely to get memory problems.
Surprising Findings
Fish oil supplements helped cognitive decline regardless of APOE ε4 status, while dietary omega-3s only helped carriers.
People assume food sources are always better than supplements—but here, supplements worked universally, while food only worked for a genetic subgroup.
Practical Takeaways
If you're over 65 and have a family history of dementia, aim for one seafood meal per week—especially fatty fish like salmon or sardines.
Publication
Journal
Neurology
Year
2016
Authors
O. van de Rest, Yamin Wang, L. Barnes, C. Tangney, D. Bennett, M. Morris
Related Content
Claims (4)
For older people who carry a specific gene variant called APOE ε4, eating moderate amounts of fish or other foods rich in omega-3s might help them remember things and think clearly a bit longer — but eating even more doesn’t help any more, and might not help at all.
Eating seafood at least once a week might help older adults with a specific gene variant keep their memory and thinking skills sharper for longer, compared to those who don't eat seafood as often.
For older people who carry a specific gene variant called APOE ε4, eating more of a plant-based omega-3 fat called ALA might help their brain slow down its decline, but this benefit seems small and may disappear when you account for heart health factors.
For older people who don't have a specific gene variant called APOE ε4, eating fish or omega-3s from food doesn't seem to help slow down memory loss or brain aging over about five years.