For this study researchers gathered information from the medical records of 7,625 individuals over the age of 65 from three cities in France: Bordeaux, Dijon and Montpellier. None of the participants had a history of stroke. They than categorized the individuals into three groups based on their olive oil consumption: “no use,” “moderate use” which involved using olive oil in cooking or as dressing or with bread, and “intensive use,” which included using olive oil for both cooking and as dressing. The researchers noted that the participants used mostly extra virgin olive oil, as that is what is usually available in France.