Olive Oil (ELOO) - one of the World's Healthiest Foods?
Olive oil is rich in Vitamin E, a fat-soluble antioxidant:
"It turns out that people who use olive oil regularly, especially in place of other fats, have much lower rates of heart disease, atherosclerosis, diabetes, colon cancer, and asthma."
This is a pretty technical article. The most interesting and relevant bit concerns storage: it should be in a dark place, away from heat. Most olive oil is in glass bottles, so that means I shouldn't store mine by the stove but in a closed cupboard :)