Kale provides an excellent source of vitamins B6 and C, carotenes, and manganese. It is also a very good source of vitamins B1, B2, and E, fiber, iron, copper, and calcium.
Kale has almost three times as much calcium as phosphorus. This is a beneficial ratio because high phosphorus consumption has been linked to osteoporosis since it reduces the utilization and promotes the excretion of calcium. Kale and collard greens exhibit the same anticancer properties as other members of the cabbage family.