Turnip Greens

Ed Bender, a professor at the University of California at San Diego, lists turnip greens as a rich source of lutein, a carotenoid that helps prevent ocular diseases such as macular degeneration and cataracts. An adequate intake of lutein may also inhibit some forms of cancer and prevent the development of clogged arteries and osteoarthritis. Turnip greens also give you a high amount of vitamin A. Men and women need 625 and 500 milligrams, respectively, of vitamin A each day; a cup of raw turnip greens provides you more than twice that amount, according to the North Carolina State University Extension.