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

Pistachios produced the greatest gamma wave response, which is critical for enhancing cognitive processing, information retention, learning, perception and rapid eye movement during sleep.

Peanuts produced the highest delta response, which is associated with healthy immunity, natural healing, and deep sleep.