"Greens are the No. 1 food you can eat regularly to help improve your health," says Jill Nussinow, MS, RD, a culinary educator in Northern California and the author of The Veggie Queen. That's because leafy vegetables are brimming with fiber along with vitamins, minerals, and plant-based substances that may help protect you from heart disease, diabetes, and perhaps even cancer. Even so, Americans are not eating as many vegetables each day as dietary experts recommend.

To encourage you to put more leafy vegetables on your plate, WebMD asked Nussinow to rank the country's most widely-eaten greens from most nutritious to least.

Here's our top 10 list: 

1. Kale: This nutrition powerhouse "offers everything you want in a leafy green," says Nussinow, who gave it her first-place ranking. It's an excellent source of vitamins A C, and K, has a good amount of calcium for a vegetable, and also supplies folate and potassium. Kale's ruffle-edged leaves may range in color from cream to purple to black depending on the variety.
   
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