Roasted peanuts improve brain blood flow and memory

Regular consumption of roasted, unsalted peanuts with skin improves brain function and memory in older adults, according to researchers from the Institute of Nutrition and Translational Metabolism Research at Maastricht University Medical Center, Netherlands. The study was published in Clinical Nutrition.

Thirty-one healthy participants aged 60 to 75 took part in the 16-week trial, eating 60 grams of peanuts daily (about two servings). Results showed a 3.6% increase in cerebral blood flow and a 5.8% improvement in verbal memory. Systolic blood pressure dropped by 5 mmHg, and pulse pressure by 4 mmHg.

“Cerebral blood flow is an important physiological indicator of vascular brain function. It reflects how efficiently blood delivers oxygen and nutrients essential for cognitive health,” explained Dr. Peter Joris, Associate Professor at Maastricht University.

Blood flow improved particularly in the frontal and temporal lobes, which are responsible for memory and thinking.

Peanuts are rich in plant protein, arginine (important for vascular health), unsaturated fats, and polyphenols with antioxidant effects. The skin adds extra fiber and natural antioxidants.

Researchers emphasize that as people age, vascular brain function declines, increasing the risk of dementia. Therefore, even small dietary changes—like eating a portion of peanuts daily—can help protect against age-related memory decline.