Whatever benefit or problem,.. there are always a combination of factors but I think that one of the more obvious ones in this case would be.. as another comment mentioned- a degree of isolation from the mainstream world and of course the Mediterranean diet. In the US and many other highly populated places in the world now- "oils" have become a dirty word because manufactured/ modified plant oils are very harmful to health while being presented in a way that appears "healthy". But natural oils like olive oil and flax, which completely cured an autoimmune blood disorder that I encountered 15ys ago, saving me from butchery and ongoing drug dependence are among the most important foods that are missing in the pro-corporate "industrial diet" (what you'll probably buy at the grocery store). This is very likely the most significant cause of the un natural inflammatory conditions that are behind countless personal tragedies that we are all negatively effected by- directly or indirectly at first. The governments and so- called protective agencies are deceiving the majority of our populations and allowing big business to hijack food supplies. All it takes is some independent research (yours) to realize this. Most people however, will follow the pack, go with the flow toward illness rather than risk having to cope with awareness.