From Fit Formula:

Now you know this leafy green has calcium and flavonoids, so clearly  kale benefits your body in those ways. But it doesn’t stop there. Kale  is also high in vitamin A, which can improve your skin, vision, and bone  health. In addition, kale has a lot of vitamin C, which further boosts  the immune system while improving the bones, skin, and blood vessels.  Vitamin K is featured in this superfood, too, which is good because it  reduces bone loss and helps transport calcium through the body. Finally,  kale has folate and magnesium, which help with bone marrow, fetal  development, energy levels, heart health, and more. Considering all the  ways kale benefits your body, it’s obvious you need it in your diet if  you’re interested in being healthy. (Read more.)