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IntInsight
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A long term study suggests people with the APOE4 Alzheimer’s gene may benefit from diets higher in unprocessed meat and fish showing slower cognitive decline

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Fit Body Science
Fit Body Science
Science fact-checking · Jul 18, 2026

APOE4 carriers who ate more unprocessed meat and fish had slower cognitive decline—while those on low-fat diets declined faster. Their brains literally preserved memory better with whole animal foods, not supplements or grains. 🐟 https://s.fitbodyscience.com/2XKy7Z

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Scientific verdict1 claim checked

Very strong evidence

Multiple randomized or controlled trials back these claims.

60Supports
0Challenges
100%Claims hold up
The breakdown

For some people, the key to keeping their mind sharp might be as simple as choosing steak over bacon.

Other research found that people with the APOE4 gene who ate more fish and unprocessed meats like beef or chicken tended to maintain better memory and thinking skills over time, and were less likely to develop dementia compared to those who ate less. This isn’t about processed meats like sausage or bacon—it’s specifically about whole, unprocessed sources. The findings suggest that what counts as a ‘healthy’ diet might depend on your genes, which is a surprising twist on the usual one-size-fits-all nutrition advice.

Bottom line

If you carry the APOE4 gene, swapping out processed meats for fish and steak might help your brain age more gracefully—but it’s not a guaranteed shield against decline.

ReliabilityThe evidence mostly supports this with some caveats
Fit Body Science verdict — we translate health claims into clear verdicts backed by peer-reviewed research.

Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.

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