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Diet tied to slower brain aging in major study

Researchers analyzed dietary patterns alongside repeated brain scans

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Mark Huffman
Reporter

Mark Huffman has covered consumer issues since 2004, with a special focus on protecting and empowering older adults. A former news correspondent for the Associated Press Radio Network, Westwood One, and ConsumerAffairs, Mark brings decades of journalistic experience to RetirementLiving.com. He is passionate about giving consumers a voice and helping them make informed decisions. Mark has also created educational content, including Senior Scam Alert, a video resource designed to help seniors recognize and avoid fraud. He holds a B.A. from the University of Kentucky and lives with his family in Richmond, Virginia.
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Key Insights

  • A long-term study of 1,647 adults found that higher adherence to the MIND diet was linked to slower brain atrophy over more than a decade.
  • Participants with better diet scores showed reduced loss of gray matter and slower enlargement of brain ventricles.
  • The effect translated to up to 20% slower age-related brain changes, equivalent to delaying brain aging by about 2.5 years.

A diet designed to promote brain health may significantly slow structural changes associated with aging, according to new research published in the Journal of Neurology, Neurosurgery & Psychiatry.

The study, based on data from 1,647 middle-aged and older adults in the long-running Framingham Heart Study, found that people who more closely followed the MIND diet experienced measurably slower deterioration in brain structure over time.

Tracking brain changes over a decade

Researchers analyzed dietary patterns alongside repeated brain scans collected over a median follow-up of 12.3 years. Participants’ adherence to the MIND diet — a hybrid of the Mediterranean and DASH diets — was scored using validated food questionnaires administered across multiple study visits. 

The results showed a clear association: for every three-point increase in diet adherence, participants had a 0.279 cubic centimeter per year slower decline in total gray matter volume, a key marker of brain health.

That reduction corresponds to about a 20% slowdown in age-related brain changes, or roughly 2.5 fewer years of brain aging over the study period.

Less shrinkage, slower fluid buildup

Beyond gray matter preservation, higher MIND diet scores were also linked to slower expansion of the brain’s lateral ventricles — fluid-filled spaces that typically enlarge as the brain shrinks with age. 

The study estimated this effect equated to about an additional year of delayed brain aging, reinforcing the diet’s potential protective role against neurodegeneration. 

Previous research has already associated the MIND diet with better cognitive performance and a lower risk of dementia. However, most earlier studies were cross-sectional, offering only snapshots in time.

This new longitudinal analysis strengthens the case by showing that dietary habits are linked not just to cognitive outcomes, but to actual structural changes in the brain over years.

What is the MIND diet?

The MIND diet emphasizes foods linked to brain health, including leafy greens, berries, nuts, whole grains, fish, and olive oil, while limiting red meat, butter, sweets, and fried foods. 

Researchers say the findings suggest diet could play a meaningful role in delaying neurodegenerative processes, though they caution that observational studies cannot prove cause and effect.

With populations aging and dementia rates rising, the results highlight diet as a potentially accessible strategy to support brain health.

“Greater adherence… was associated with slower progression of brain structural atrophy,” the authors concluded, pointing to the diet’s promise in delaying age-related brain decline. 

While clinical trials are still needed, the study adds to growing evidence that what people eat in midlife and beyond may influence how their brains age.