MIND Diet: Slow Brain Aging by 2.5 Years & Protect Cognitive Function

A recent study has revealed that a specific dietary pattern may help gradual the aging of the brain. The diet, known as the MIND diet, is a hybrid of the Mediterranean and DASH diets, and research indicates it could slow the rate of structural brain changes by more than two years.

The MIND diet – short for Mediterranean-DASH Intervention for Neurodegenerative Delay – emphasizes foods considered beneficial for brain health, including berries, nuts, green leafy vegetables, fish, poultry, whole grains, and olive oil. The diet was initially introduced in 2015 by Dr. Martha Clare Morris and colleagues at Rush University Medical Center and the Harvard Chan School of Public Health, following a decade-long study of older adults.

Conversely, foods high in saturated fat, such as cheese, butter, red meat, and fried foods, are significantly limited. Senior researcher Changzheng Yuan noted that individuals who more closely adhered to the diet exhibited slower brain aging over a 12-year observation period. “Notably, the shrinkage of brain grey matter occurred at a slower pace,” Yuan stated.

Grey matter is a crucial component of the brain responsible for memory, thinking, and decision-making. The study, involving over 1,600 participants, found that increased adherence to the MIND diet correlated with a 20% reduction in grey matter shrinkage and a delay in brain aging of approximately 2.5 years. These findings align with previous research linking the Mediterranean and MIND diets to a reduced risk of Alzheimer’s disease.

The research also revealed impacts on other brain regions, specifically the ventricles – fluid-filled spaces within the brain. Participants following the MIND diet experienced a slower rate of ventricular enlargement and a reduced risk of brain shrinkage. Each increase in dietary adherence was associated with an 8% reduction in ventricular growth, equivalent to a one-year slowdown in brain aging.

Researchers identified certain foods as having the most significant effects: berries were found to slow ventricular enlargement, while poultry consumption slowed both grey matter and ventricular shrinkage. Lead author Hui Chen explained that berries are rich in antioxidants, while poultry provides high-quality protein.

In contrast, sugary foods and fast food were linked to accelerated brain aging, including damage to the hippocampus – a brain region vital for memory. The study also found that the MIND diet’s effects on cognition were greater than those of the Mediterranean or DASH diets alone.

While the results are promising, experts caution that the research is observational and cannot definitively prove a cause-and-effect relationship. David Katz suggested that individuals with healthier brains may simply be more inclined to choose better dietary patterns. However, he believes a more plausible connection is that a healthy diet contributes to brain health.

Researchers emphasize that the greatest benefits stem from the overall dietary pattern, rather than any single food. “Foods are consumed together, so the combined effects are more important than any one food in particular,” Chen stated. The MIND diet score was developed to identify foods and nutrients, along with daily serving sizes, related to protection against dementia and cognitive decline.