According to the  Consumer Reports on Health of Cincinnati, the Mediterranean diet is a diet that comes closest to a correct and healthy diet in all respects. Although our diet  is in crisis thanks to the prevailing low-carbohydrate diets , and there has been a decrease in the consumption of some foods that are the protagonists of our diet , such as pasta and olive oil, it seems that the Mediterranean diet you find confirmation everywhere for its benefits in cardiovascular health and against some degenerative diseases, such as dementia.  However, it should be noted that the study does not concern the Mediterranean diet in Italy, but the Greek one. In fact, Greece is the real protagonist of the healthiest diet, while there is some doubt about the Italian Mediterranean diet that makes you fat due to too many carbohydrates, as I explain here . But what is the difference between the Greek and Italian diets?
Mainly the Greek diet is based on a greater consumption of fish than meat, cooked in a simple way, legumes, vegetables, dried fruit including nuts, olives, olive oil, Greek yogurt and feta (as if it rained, they are lower in content. of lactose), various smells, honey, wine and many vegetable sauces. The meats are lean: lamb, veal, chicken. Where is the first course? There is not. 
Therefore the Greek diet, unlike the Italian Mediterranean, has a lower consumption of carbohydrates and fats.
One of the current problems of the Mediterranean diet is the large quantity of pasta or rice (eight times a week!).
Perhaps this is also why the Greek Mediterranean diet works better?