As we grow older, preserving memory, concentration and the ability to think clearly becomes increasingly important. While ageing is inevitable, emerging research continues to explore how everyday lifestyle choices, particularly what we eat, may influence the health of our brains.
A September 2026 study has added to this growing body of evidence, suggesting that people who follow the MIND diet more closely may have healthier blood vessels in the brain, better cognitive performance and greater preservation of brain structure. Could the secret to ageing with a sharper mind begin with what we put on our plates?
What the researchers discovered
Researchers examined more than 700 older adults without known dementia to investigate the relationship between dietary habits and brain health. Participants completed food questionnaires, underwent cognitive assessments and received magnetic resonance imaging (MRI) scans.
The study, published in Alzheimer’s & Dementia, found that people whose eating habits more closely followed the MIND diet tended to have healthier brain structures and better cognitive test results. Their scans also showed fewer signs of cerebral small vessel disease, a condition involving damage to the tiny blood vessels that supply brain tissue.
Researchers observed that participants with stronger adherence to the diet had less evidence of small-vessel damage, larger overall brain volume and fewer signs of white matter scarring. These findings suggest that the relationship between food choices and cognitive performance may partly involve the condition of the brain’s circulatory system.
Understanding the MIND diet
MIND stands for Mediterranean-DASH Intervention for Neurodegenerative Delay. The eating pattern combines principles from the Mediterranean diet and the Dietary Approaches to Stop Hypertension (DASH) diet, emphasising foods associated with cardiovascular and cognitive health.
The approach encourages regular consumption of leafy green vegetables, berries, whole grains, beans, legumes, nuts and olive oil. It also recommends limiting fried foods, pastries, sweets, butter and processed red meat.
These food choices provide a range of nutrients, including vitamins, minerals, fibre and plant-based compounds. Leafy greens, for example, supply folate and other nutrients involved in normal cellular function, while berries contain polyphenols that researchers are investigating for their potential role in supporting healthy ageing.
Why brain blood vessels matter
The brain relies on a continuous supply of oxygen and nutrients delivered through an extensive network of blood vessels. When these vessels become damaged or narrowed, the surrounding tissue may receive less effective circulation, potentially affecting memory, attention and other cognitive abilities.
Cerebral small vessel disease can develop gradually and may be associated with changes in thinking and an increased risk of dementia. MRI scans can reveal indicators of this condition, including changes in white matter.
The study found that healthier dietary patterns were associated with lower levels of small-vessel disease and better-preserved brain structure. This offers a possible explanation for why participants who followed the MIND diet more closely also tended to perform better on cognitive assessments.
Researchers noted that these relationships remained significant after accounting for several factors, including physical activity, body mass index and existing vascular disease. Nevertheless, additional studies are required to determine whether dietary changes directly improve these measurements over time.
Expert insight
Lead researcher Puja Agarwal, an assistant professor of internal medicine at Rush University in Chicago, highlighted the strength of the association after statistical adjustments. Agarwal stated: “One of the most striking findings was that the relationship remained significant even after accounting for factors such as physical activity, body mass index, race and vascular disease.”
Practical ways to follow the diet
Adopting the MIND diet does not require an immediate overhaul of daily meals. Adding leafy greens to lunch, choosing berries as a snack, including beans in soups and replacing some refined grains with whole grains are practical starting points. Regularly preparing varied plant-based meals can also make the eating pattern easier to maintain. Consistency matters more than relying on a single so-called brain-boosting food.
The message from this research is encouraging: the everyday choices we make at the dining table may have implications beyond physical health. A diet rich in vegetables, berries, whole grains, nuts and legumes could play a part in preserving the brain’s structure and supporting clearer thinking as we grow older.
The findings do not establish that the MIND diet prevents dementia or directly reverses damage to the brain. More research is needed to determine whether changing dietary habits can produce measurable improvements over time. Nevertheless, there is good reason to pay closer attention to what goes on our plates. After all, while we cannot stop the passage of time, we can make choices that give our brains a better chance of ageing well.
- Joy Essien is Contributing Editor, Lagos Metropolitan
