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A study from the Institute of Nutrition and Translational Research in Metabolism (NUTRIM) at Maastricht University Medical Center in Maastricht, the Netherlands, has found that longer-term consumption of unsalted, skin-roasted peanuts can benefit insulin responsiveness in the brains of older adults. The findings are published in Food & Function.

Insulin acts as a vital signaling molecule in the brain that supports the growth and survival of nerve cells and communication between them, all of which are important for memory and may help protect against Alzheimer's disease.

The study documented that, after a 16-week course of peanut consumption, brain insulin responsiveness improved in a cluster in the right hemisphere, encompassing parts of the lingual gyrus, hippocampus and parahippocampal and posterior cingulate gyri, which are brain regions involved in memory.

"The hormone insulin plays an important role in the brain, where it supports memory and other cognitive processes. As people age, the brain may become less responsive to insulin, which has been linked to age-related cognitive decline," says Dr. Peter Joris, the study's senior author and an associate professor in the Department of Nutrition and Movement Sciences, NUTRIM, Maastricht University Medical Center.

"Our study found that daily peanut consumption beneficially affected insulin responsiveness in memory-related brain regions in older adults.

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