When it comes to health benefits, Extra Virgin Olive Oil (EVOO) is a delicate subject. The FDA (US Food and Drug Administration) has started studying the question more closely and recently released a statement about its potential health benefits that you can consult here.
Although studies tend to exhibit positive results, please keep in mind that although extra virgin olive oil is mostly composed of monounsaturated fat (“Good fat”), it is still fat, and thus should be consumed with moderation (we know, it is so good that it is hard to resist, we have the same problem).
The Mediterranean diet
Where it all started. The American physiologist Ancel Keys and his wife Margaret spent 50 years studying eating patterns in 7 countries. Read about it here: https://www.sevencountriesstudy.com.