These mini trees are notorious for being pushed off the plates of kids around the world, but broccoli’s reputation as one of the healthiest veggies still rings true. Broccoli contains high levels of fiber and is a rich source of vitamin C. In addition, broccoli is rich in vitamin A, iron, vitamin K, B-complex vitamins, zinc and more. Studies have found that broccoli can potentially help prevent osteoarthritis, protect skin against the effects of UV light, reverse diabetes heart damage, and reduce bladder cancer risk.