Iceberg, romaine, kale: which salad greens are healthiest?

If you’re trying to meet your daily serving of 2.5 cups of vegetables, you might have some questions If you want to eat lettuce, that no longer just means iceberg. In our bountiful age, there are many options: romaine, red-leaf lettuce, butter lettuce, beet greens, bok choy, bitter radicchio, every developmental stage of arugula. Sometimes, it’s simply up to preference. But if you’re trying to…