Kale is a nutritionally dense superfood (and has been dubbed one of the most nutritious foods on the planet) packed with fiber and an excellent source of several essential nutrients. In fact, a single cup of raw kale contains almost 700% of your daily vitamin K, over 200% vitamin A, and around 130 (ish)% daily vitamin C! Combined with the fact that these leafy greens are also low in calories (at just over 30 calories per cup of raw kale) and carbs, they make for a perfect potato chip alternative and healthy snack for all.