Asking a nutrition expert “what’s the healthiest vegetable?” is kind of like asking a parent “who’s your favorite child?” They’re all great, and they each have unique characteristics that make them so. But if the life of our firstborn depended on it — not that he’s our favorite! — we’d dub watercress the healthiest veggie on the planet.
Gram for gram, the flowery cruciferous vegetable contains more than four times as much beta carotene as an apple — a compound that research shows rivals self-tanner in its ability to improve skin’s complexion. And 100 grams (or about 3 cups chopped) the leafy green more than 75 percent of your recommended intake of vitamin C, a nutrient that’s shown to speed-up fat-burning.