A new study reveals that consuming approximately 60 grams of unsalted, skin-roasted peanuts daily can significantly enhance brain function and reduce blood pressure. Conducted by researchers at Maastricht University Medical Centre, the study indicates that this affordable snack may help in preventing dementia, a condition affecting millions worldwide.
The research, published in the journal Clinical Nutrition, involved a randomized trial with 31 participants averaging 67 years old. Over 16 weeks, participants either consumed peanuts or served as a control group without peanuts. Those in the peanut group experienced notable improvements in cerebral blood flow (CBF) and cognitive abilities.
Key Findings of the Peanut Study
Participants who consumed peanuts showed a remarkable 3.6% increase in CBF, which is crucial for delivering oxygen and nutrients to the brain. Additionally, their verbal memory performance improved by 5.8%, indicating a better ability to recall information. Grey matter volume also increased by 4.5%, while systolic blood pressure and pulse pressure decreased.
To ensure the integrity of the results, researchers implemented strict guidelines for the participants. These included prohibiting the consumption of other nuts, restricting physical activity for 48 hours prior to examinations, and requiring fasting for at least 12 hours before each visit. These measures helped isolate the effect of peanuts on brain function.
According to Peter Joris, an associate professor in the Department of Nutrition and Movement Sciences at Maastricht University, “CBF is an important physiological marker of brain vascular function and refers to the amount of blood that flows through the brain, delivering oxygen and nutrients that are essential for maintaining brain health.”
Global Context of Dementia
The implications of this research are particularly important for older adults, as age-related decline in cerebral blood vessels can increase the risk of dementia. The World Health Organization reported that 57 million people globally were living with dementia in 2021. Projections suggest this number could rise to 78 million by 2030 and reach 139 million by 2050.
The study concluded that daily consumption of skin-roasted peanuts for 16 weeks improved brain vascular function in healthy older adults. These favorable effects may support enhancements in verbal memory, suggesting a potential mechanism by which increased peanut intake positively influences cognitive performance. This research not only highlights the health benefits of a simple dietary change but also emphasizes the need for further exploration of dietary interventions in promoting brain health.