1) Kale boosts immunity.[1][2] A really simple experiment was done where kale extract was added to a petri dish and white blood cells' antibody production dramatically increased. This effect is present regardless of whether the kale is cooked or raw. This effect has been confirmed in vivo.
2)Consuming kale juice on a regular basis lowers bad cholesterol and raises good cholesterol.
3)Kale consumption improves blood sugar levels in diabetics.
4)Sulforaphane and other glucosinolates in kale form isothiocyanates in the body which are thought to reduce the risk of multiple types of cancer.
5)Kale contains kaempferol, quercetin, and other flavonoids which are thought to reduce inflammation.
6)Kale contains beta-carotene, lutein and zeaxanthin, all of which help protect the skin from sun damage and help protect the eyes.
7) Kale is very nutritionally dense, containing many other compounds which have independently shown to be beneficial, including vitamins (A, B1, B2, B3, B6, C, E, K), calcium, copper, manganese, fiber, , folate, chlorophyl and omega-3 fatty acids.