Daily Peanuts May Sharpen Memory and Slow Brain Ageing in Older Adults

Eating unsalted roasted peanuts with their skins could boost brain health in older adults. A recent study suggests that daily consumption may improve memory and slow age-related decline. Researchers found measurable benefits after just 16 weeks of regular intake. The study involved 31 healthy participants aged 60 to 75. Each consumed 60 grams of peanuts every day for four months. By the end, cerebral blood flow had increased by 3.6%, particularly in the frontal and temporal lobes—the areas linked to memory and thinking.

Peanuts contain plant-based protein, arginine, and unsaturated fats, all of which support brain function. Their skins add extra fibre and natural antioxidants, which may further protect cognitive health. Participants also saw a drop in systolic blood pressure by 5 mmHg and pulse pressure by 4 mmHg. Verbal memory performance improved by 5.8% in those who ate peanuts daily. Researchers from Maastricht University Medical Center led the work, focusing on how diet affects brain ageing. Poor vascular function in the brain is known to raise dementia risk, making these findings particularly relevant.

The results suggest that a simple dietary change could help maintain brain function as people age. Improved blood flow and lower blood pressure were among the key benefits observed. Further research may explore whether these effects last over longer periods.