The consumption of peanuts may positively affect brain function and blood pressure levels. This conclusion was reached by the authors of the study reported by the Independent.
The focus of specialists was on roasted peanuts in the shell without added salt. Researchers note that this product is rich in dietary fiber, fats, and protein, but particular interest was sparked by its L-arginine content. This substance is involved in the production of nitric oxide—a compound that promotes vasodilation and maintains normal blood flow. Additionally, the peanut shell contains a number of biologically active compounds, including the antioxidant resveratrol.
The study involved 31 participants aged 60 to 75 years. The experiment was divided into two phases. During the first four months, participants consumed 60 grams of peanuts daily. This was followed by a two-month period during which the product was completely excluded from their diet.
To assess changes, the researchers used magnetic resonance imaging and conducted cognitive function testing. The results showed an average increase in cerebral blood flow of 3.6 percent. The most noticeable changes were recorded in the frontal and temporal lobes of the brain, which are associated with memory and other cognitive processes.
In addition, participants showed improved memory performance and a slight decrease in blood pressure. However, reaction time and some other parameters remained unchanged.
The authors of the study emphasize that the mechanism of peanuts' effect on the body remains unclear. No explanations were provided regarding the participants' body weight: despite the increase in dietary calories, no weight gain was recorded.
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