This Eating Pattern Was Linked to a Brain That Aged 2.5 Years More Slowly

Key takeaways

• In 1,647 middle-aged and older adults followed with repeated MRI scans for about 12 years, stronger adherence to the MIND diet was associated with slower age-related loss of grey matter and slower ventricular enlargement.

• Every 3-point higher MIND score was associated with 20% less grey-matter decline—an effect the researchers estimate as roughly 2.5 years of delayed structural brain aging.

• The MIND pattern emphasizes leafy greens, other vegetables, berries, nuts, beans, whole grains, fish, olive oil, and poultry, while limiting sweets, fried fast foods, butter, cheese, and red meat.

• This was observational research based partly on food questionnaires, so it cannot prove that the diet caused the MRI differences.

The MIND diet, scanned

The MIND diet combines elements of Mediterranean-style eating and the DASH blood-pressure diet, then gives special emphasis to foods thought to support brain health—particularly leafy greens and berries.

In the Framingham Heart Study Offspring cohort, participants with higher MIND scores had less grey-matter loss over time. Grey matter supports functions including memory, learning, decision-making, and information processing, while enlarging ventricles can reflect loss of surrounding brain tissue.

The result is notable because it tracks a physical feature of brain aging, not only self-reported diet or performance on a cognitive test.

The 2.5-year estimate

The headline figure comes from the association between each 3-point MIND-score increase and slower grey-matter decline: 0.279 cubic centimeters less loss per year, estimated as 20% less age-related decline and about 2.5 years of delayed brain aging. Ventricular expansion was also slower, equivalent to about one year of delayed aging by the authors’ estimate.

That does not mean switching to the MIND diet literally turns back every person’s brain age by 2.5 years. It means that, in this population, people reporting stronger adherence had MRI trajectories that looked more favorable on average.

What stood out

Berries and poultry were each associated with slower markers of brain-tissue change, while higher intakes of sweets and fried fast foods were associated with less favorable changes, including faster ventricular enlargement or hippocampal loss.

Some individual-food results ran against expectations: whole-grain intake was associated with unfavorable structural changes, while cheese intake was associated with more favorable ones. Those surprising findings are a reason to focus on the full dietary pattern rather than build rules around single ingredients.

The takeaway

This study strengthens the case for the MIND diet as a practical, pattern-based approach to brain health: more plants, berries, legumes, nuts, whole grains, fish, olive oil, and poultry; fewer sweets and fried fast foods.

But it is a strong association, not proof of cause and effect. Diet tends to travel with other factors—exercise, education, smoking, body weight, medical care, and socioeconomic conditions—that also influence brain health. The useful takeaway is not a food-by-food prescription; it is that a consistent, whole-food dietary pattern may matter over decades.

Reference:
Chen H, Hailili G, Tong L, et al. Adherence to the MIND diet and longitudinal brain structural changes over a decade: evidence from the Framingham Heart Study Offspring cohort. Journal of Neurology, Neurosurgery & Psychiatry. 2026;97:505. doi:10.1136/jnnp-2025-336957.