Nuts strengthen brainwave function, study finds

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16 Nov 2017 --- Eating nuts on a regular basis strengthens brainwave frequencies associated with cognition, healing, learning, memory and other key brain functions, researchers at Loma Linda University Health have found. In a study titled "Nuts and brain: Effects of eating nuts on changing electroencephalograph brainwaves," published in the FASEB Journal, researchers found that some nuts stimulated some brain frequencies more than others. 

Pistachios, for instance, produced the greatest gamma wave response, which is critical for enhancing cognitive processing, information retention, learning, perception and rapid eye movement during sleep. Peanuts, which are legumes, but were still part of the study, produced the highest delta response, which is associated with healthy immunity, natural healing and deep sleep.

The study's principal investigator, Lee Berk, DrPH, MPH, associate dean for research at the LLU School of Allied Health Professions, says that while researchers found variances between the six nut varieties tested, all of them were high in beneficial antioxidants, with walnuts containing the highest antioxidant concentrations of all.

Prior studies have demonstrated that nuts benefit the body in several significant ways: protecting the heart, fighting cancer, reducing inflammation and slowing the aging process. But Berk believes too little research has focused on how they affect the brain.

“This study provides significant beneficial findings by demonstrating that nuts are as good for your brain as they are for the rest of your body,” Berk says, adding that he expects future studies will reveal that they make other contributions to the brain and nervous system as well.

Berk – who is best known for four decades of research into the health benefits of happiness and laughter, as well as a cluster of recent studies on the antioxidants in dark chocolate – assembled a team of 13 researchers to explore the effects of regular nut consumption on brainwave activity.

The team developed a pilot study using consenting subjects who consumed almonds, cashews, peanuts, pecans, pistachios and walnuts. Electroencephalograms (EEG) were taken to measure the strength of brainwave signals. EEG wave band activity was then recorded from nine regions of the scalp associated with cerebral cortical function.

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