Daily peanuts may sharpen memory and brain health in older adults

A recent study suggests that eating peanuts daily could boost brain health in older adults. Researchers from Maastricht University Medical Center tracked 31 healthy participants aged 60 to 75 over 16 weeks. Their findings show that a small dietary change—adding 60 grams of peanuts each day—may improve memory and blood flow to the brain. The study involved participants consuming unsalted roasted peanuts with their skins. After 16 weeks, cerebral blood flow increased by 3.6%, particularly in the frontal and temporal lobes—the areas linked to memory and thinking. Verbal memory performance also rose by 5.8%.

Blood pressure benefits were recorded too. Systolic pressure dropped by 5 mmHg, while pulse pressure fell by 4 mmHg. Researchers noted that peanut skins, rich in fibre and antioxidants, may have contributed to these effects. Peter Joris, an assistant professor at Maastricht University, explained that better cerebral blood flow indicates improved vascular function in the brain. Peanuts contain plant-based protein, arginine, healthy fats, and polyphenols—all of which support brain and heart health. The results suggest that even modest dietary changes could help protect against age-related cognitive decline.

The study highlights a simple way for older adults to support brain function. Daily peanut consumption was linked to better memory, lower blood pressure, and increased blood flow to key brain regions. Researchers now recommend further studies to confirm these benefits over longer periods.