Can you tell me if there's any health advantage to using extra-virgin olive oil instead of virgin olive oil or just plan old olive oil? [electronic resource] - Mayo Clinic health letter (English ed.) Nov 2003 - 8 p. digital Publication Type: Journal Article ISSN: 0741-6245 Subjects--Topical Terms: Antioxidants--administration & dosageDietary Fats, Unsaturated--administration & dosageHealthOlive OilPlant Oils--administration & dosage