Mustard greens are an excellent source of many vitamins including vitamin K, vitamin A (in the form of beta-carotene), vitamin C and vitamin E. They are also an excellent source of the minerals copper, manganese, and calcium.
Spinach (Spinacia oleracea) is an edible flowering plant in the family Amaranthaceae native to central and western Asia. Its leaves are commonly eaten as a vegetable, either fresh, frozen, canned, chipped, or dehydrated.