Why do I eat this?

1. Kale can provide you with some special cholesterol-lowering benefits if you will cook it by steaming. 
2. The fiber-related components in kale do a better job of binding together with bile acids in your digestive tract when they've been steamed.
3. Lowering of your cholesterol levels. Raw kale still has cholesterol-lowering ability--just not as much.
4. Kale's risk-lowering benefits for cancer have recently been extended to at least five different types of cancer. These types include cancer of the bladder, breast, colon, ovary, and prostate. 
5. Help regulate detox , has  over 45 different flavonoids in kale. Kale's flavonoids combine both antioxidant and anti-inflammatory benefits in way that gives kale a leading dietary role with respect to avoidance of chronic inflammation and oxidative stress.

Source : http://www.whfoods.com/genpage.php?tname=foodspice&dbid=38