Scientists have discovered unexpected benefits for the brain from daily peanut consumption
- Daily peanut consumption improves the brain's response to insulin
- The study was conducted on 31 individuals aged 60-75 years
- Peanuts may contribute to improved memory and cognitive functions.
The benefits of peanuts for the brain: new studies show
A recent study conducted by scientists from Maastricht University revealed unexpected benefits of daily peanut consumption for the brain health of older adults. The study found that regular consumption of unsalted roasted peanuts may improve the response of certain areas of the brain to insulin. These results were published in the peer-reviewed journal Food & Function and may have important implications for understanding cognitive health in older age.
The study involved 31 healthy individuals aged 60 to 75 who consumed 60 grams of peanuts daily for 16 weeks. The researchers used a randomized controlled crossover design, allowing them to compare the effects of peanut consumption with a period of exclusion from the diet. The results showed an improvement in insulin sensitivity in several areas of the right hemisphere of the brain, including the hippocampus and other memory-related structures.
Dr. Peter Joris, the senior author of the study, noted that insulin plays a crucial role in maintaining cognitive functions such as memory. As we age, the brain may become less sensitive to insulin, which is associated with a decline in cognitive abilities. The findings emphasize the importance of maintaining healthy insulin levels to protect against age-related changes in the brain.
The study and its results
The research methodology included the use of arterial spin labeling magnetic resonance imaging (ASL-MRI) to assess changes in cerebral blood flow and insulin sensitivity. Participants were administered insulin nasally, after which researchers tracked changes in regional cerebral blood flow. This allowed for accurate data on the effects of peanuts on the brain and its functions.
Additionally, researchers used abdominal MRI to measure fat accumulation in the liver, which may also affect brain health. The cognitive abilities of participants were assessed using standardized tests, ensuring the reliability of the results obtained. These methods provided a deeper understanding of how peanuts impact brain health.
Previous studies have shown that peanut consumption may increase overall cerebral blood flow and improve verbal memory. In particular, one study published in 2025 found that 16 weeks of peanut consumption increased cerebral blood flow by 3.6% and improved memory test scores by 5.8%. These data confirm the importance of peanuts as a dietary element for older adults.
Research methodology
Scientists suggest that several components of peanuts may contribute to their positive effects on brain health. These may include unsaturated fats, fiber, vitamins and minerals, as well as biologically active phytochemicals. Peanuts are also a good source of plant protein and are rich in L-arginine, which may help improve memory and learning.
To ensure a consistent intake of peanuts, participants were provided with pre-measured portions. They could choose how to incorporate peanuts into their diet: eating them whole, dividing them into several meals, or adding them to dishes. This allowed for flexibility in the diet and ensured compliance with the study conditions.
During the control period, participants completely excluded peanuts from their diet, allowing researchers to compare results from both approaches. After 16 weeks, participants changed conditions, which ensured data reliability and the ability to assess the impact of peanuts on brain health.
Potential mechanisms of action of peanuts
The study was conducted under the guidance of Associate Professor Dr. Peter Joris and PhD candidate Lucia Kerkhof from Maastricht University. Funding was provided by the Peanut Institute, however, the institute did not participate in the design, conduct of the study, or analysis of the results, which underscores the independence of the scientific work.
The results obtained may have significant implications for the development of dietary recommendations for older adults. Given that cognitive impairments become increasingly common with age, incorporating peanuts into the diet may be a simple and accessible way to support brain health.
However, questions remain about how exactly peanuts affect various aspects of cognitive health and what mechanisms underlie these effects. Further research is needed to confirm these results and determine how to optimize peanut consumption for maximum brain benefits.
Source: ScienceDaily
