You should understand that people from Italy (like myself) are MUCH healthier than your average fat American slob. I know that that term does not apply to people on this site, as we strive for more muscle, less fat, and live healthier lifestyles in general.
Consider this, take your average overweight and sick American, infuse them with very healthy nutrients, is it really so crazy to think that they would have a drastic change in their health ? Whether or not this claim about the people of Limone is true, it could very well be possible that if you took an already sick population and cleaned up their food, they would show a positive change in their health.
Razwell, you are talking about a people and a culture that defy the American propaganda machine. The air, water, soil, is all much better, making for a much healthier quality of food. Things like that should be considered.