Olive oil is wonderful. It's been used over many hundreds of years mainly because it's easy to press and it didn't require refrigeration to keep it from going rancid back before we had refrigerators!
Olive oil is one of the only food oils that you can buy that is processed without heat and will retain more of it’s trace amounts of vitamin E, it’s magnesium rich chlorophyll, and it’s other heart protective nutrients.
Extra Virgin Olive oil has even HIGHER standards of processing. So if you can be selective go with Extra Virgin as it's made with the best & freshest olives which equals better nutrients in your oil.
However, when it is cooked with at temperatures over 150º (as in with baking and when frying anything over a light sautee) The healthful benefits of the oil are promptly destroyed and replaced with mutagenic elements that