A JAMA July 2015 study by Cinta Valls-Pedret et al suggests an positive association between a Mediterranean diet supplemented with olive oil or nuts is associated with improved cognitive function. This further supported the The Prevención con Dieta Mediterránea (PREDIMED) randomized clinical trial reported that, compared with a control diet that consists of advice to reduce dietary fat, a Mediterranean diet supplemented with either extravirgin olive oil or mixed nuts for nearly 5 years reduced the incidence of cardiovascular diseases by 30% in older individuals at high risk (Estruch R, Ros E, Salas-Salvadó J, et al; PREDIMED Study Investigators. Primary prevention of cardiovascular disease with a Mediterranean diet. N Engl J Med. 2013;368(14):1279-1290. PubMed | Click to read the article)
Mediterranean Diet and Age-Related Cognitive DeclineA Randomized Clinical Trial