Kale is a nutrition superstar due to the amounts of vitamins A, B6, C, K, folate, fiber, carotenoids and manganese it contains. One cup of raw kale has just 20 calories.

Choose kale leaves with nicely saturated tones: they’ll range from very dark blue-green lacinato kale to vibrant green curly kale. As with all greens, avoid or remove any wilted or yellow leaves.

Today’s food color trend is green – as in leafy greens, spinach, beet greens, Swiss chard and at the height of this wave is kale. Kale is one of the healthiest veggies you can put on your plate.

Kale is a leafy green vegetable that has been grown in Europe since the Middle Ages. In the last five years, its popularity has soared in the U.S. along with its reputation as a superfood loaded ...

As you shop for kale or spinach at your local grocery store, steer clear of brown or yellow leaves. Bright green leaves will indicate freshness, according to nutrition experts. (iStock) ...