If you're choosing between junk food and a salad, the salad is usually the healthier option, regardless of the types of greens used to make it, but if you're searching for the healthiest, most nutrient-packed leafy greens for your salads or sandwiches, this chart from the folks at Greatist can point you in the right direction. The secret? Look for dark, open greens over lighter-colored, tightly packed ones. More »