Olive oil is rich in monounsaturated oleic acid. This fatty acid is believed to have many beneficial effects and is a healthy choice for cooking. Extra virgin olive oil is loaded with antioxidants, some of which have powerful biological effects.Olive oil contains nutrients that fight inflammation. These include oleic acid as well as the antioxidant oleocanthal.Extra virgin olive oil has numerous benefits for heart health. It lowers blood pressure, protects bad LDL cholesterol particles from oxidation and improves the function of blood vessels.