Dubbed ‘The King of Greens’, kale is a lutein-rich superfood that promotes healthy vision. The kale antioxidant quercetin has anti-viral properties which may treat the common cold. It supplies insoluble fiber for our diet, something most of us aren’t getting enough of. Consuming kale may improve your cholesterol profile, detoxify your body and keep your liver healthy. It is rich in fiber and chlorophyll as well as a good source of vitamin C, vitamin K and pro-vitamin A.