Eating Greens and Berries for Brain Health

New research suggests that consuming vegetables and fruits, particularly berries, may enhance cognitive health as we age. A comprehensive, long-term study revealed that even adopting the MIND diet later in life can substantially reduce the likelihood of developing Alzheimer’s disease and dementia. This research, presented at the annual meeting of the American Society for Nutrition, was conducted by scientists from the University of Hawaii at Manoa and the University of Southern California. They found that middle-aged and older adults who adhered to the MIND diet—a blend of the Mediterranean and DASH diets—experienced a lower incidence of dementia compared to those who did not follow it.

The MIND diet emphasizes leafy greens, olive oil, and whole grains, but it particularly highlights the importance of berries, which are known for their positive effects on brain function. Foods are evaluated based on both type and consumption frequency, with higher scores associated with a reduced risk of dementia. For instance, eating two or more servings of berries weekly is considered more beneficial than having just one or none at all.

Researchers assessed data from the Multiethnic Cohort, which commenced in the early 1990s and tracked adults across five racial and ethnic groups. At the beginning of the study, participants who closely followed the MIND diet exhibited a 9% lower risk of dementia, with an even more significant 13% reduction observed among Black, Latino, and white participants. Those who improved their adherence to the MIND diet over ten years saw a remarkable 25% decrease in risk compared to individuals who did not follow the diet as rigorously—regardless of their adherence at the very start.

The MIND diet guidelines recommend consuming six or more servings of leafy greens weekly, alongside daily servings of other vegetables, while minimizing red meat, cheese, fried foods, pastries, and sweets. Experts stress the importance of variety in vegetable intake. While this study shows a correlation, it doesn’t establish a direct cause-and-effect relationship. Nonetheless, the findings are consistent with existing evidence that suggests Mediterranean-style diets promote overall brain and heart health. MIND stands for Mediterranean-DASH Intervention for Neurodegenerative Delay, while DASH refers to Dietary Approaches to Stop Hypertension.