Leafy Greens Guide: Kale, Spinach & Lettuce Nutrition

Leafy greens like kale, spinach, and watercress provide high levels of calcium and vitamins. From washing collard greens to understanding the nutritional value of mesclun vs. romaine, master the storage and preparation of your favorite salad greens.

Collard greens are grown as a farm on the mountain.

The Calcium Content in Kale and Collard Greens

Published Aug,24 2011 | By Chris Dinesen Rogers

Kale and collard greens are excellent dietary sources of several essential nutrients. While not the most popular of vegetables, both provide a low-calorie source of potassium and vitamins C and K. They also offer a healthy source of dietary fiber.