They are foods that are loaded with nutrients and if eaten regularly MAY prevent disease, help you to live longer in good health, make you feel happier, give you strength and boost your brain cells.
But take blueberries for instance, one of the top so-called superfoods. Blueberries contain a lot of vitamin c and other stuff. We can't get blueberries here but the kiwi fruit, citrus fruit and other berries available have similar properties. Just about every fruit, bean, nut or vegetable is a superfood. Well, maybe not an iceberg lettuce. The iceberg is valuable though, as a base for all those other goodies in your salad. Broccoli and all dark leafy greens are full of vitamins and minerals. Here we have an abundance of pomegranites, elsewhere you find acai berries (?).
How much of them do you have to eat to make any difference?
Apparently you have to eat 28 cloves of garlic a day to make any difference in your cholesterol level. You'd have to live in isolation and eat a greek diet of tzatziki and skorthalia (garlic sauce) and you still wouldn't get your 28 a day.
There is no such thing as a miracle food, a superfood. Eat what you've got fresh and local. The Eskimos or Inuits eat seal blubber, the greeks eat olive oil, the French drink red wine and eat loads of butter (or they will when the shortage ends).
These are our local superfoods. It would take a couple of posts to mention all the different plants, herbs and fruits from the rest of Greece.