Kale belongs to the cabbage (Brassica) family, is a cruciferous vegetable, and may be the closest thing on supermarket shelves to wild cabbage. This earthy-tasting dark leafy green is rich in antioxidant carotenoids and flavonoids. Kale nutritional benefits are many and it deserves its designation as a superfood.
According to the Aggregate Nutrient Density Index, a nutrition scoring system created by Dr. Joel Fuhrman, author of Eat for Health, kale scores a perfect 1000. Other foods that earned a perfect score are watercress, mustard greens, and collard greens