Kale is a green vegetable known as a superfood because of its very high nutrient content. Rich in vitamins A, C, and K, as well as essential minerals such as calcium, potassium, and iron, kale provides many health benefits. The antioxidants in kale help fight free radicals, reduce inflammation, and improve heart health. The fiber in kale also supports healthy digestion and helps regulate blood sugar levels. In addition, kale contains sulforaphane compounds that are known to have anti-cancer properties.