'World's healthiest vegetable' named — scientists say it's packed with nutrients

It's not the one you might expect but you can find it in any supermarket

If you're looking to eat smarter and healthier and get more nutrients for your calories, this will help. Scientists have ranked the world's "powerhouse fruits and vegetables" — with one vegetable scoring 100 out of 100.

It's common for people looking to eat well to stock up on fruits and vegetables like avocado, spinach and kale, which have well-established reputations for being among the healthiest things you can eat. But this vegetable outranks them all — and it's available in all supermarkets .

The humble watercress has earned this status due to its concentration of vitamins and minerals. The US government's Centre for Diseases and Control calculated the nutrient density of fruits and vegetables based on the a