Known as a super food, kale is a cruciferous vegetable that is an excellent source of vitamins and minerals including vitamin A, vitamin C, vitamin K, vitamin B6, folate, and manganese, as well as carotenoids, iron, calcium, copper and phosphorous. The nutrients in kale have made it a great supplement to offer protection from vitamin A deficiency, osteoporosis, iron-deficiency anemia, and is believed to protect from cardiovascular diseases and some cancers.