Cabbage, comprising several cultivars of Brassica oleracea, is a leafy green, red (purple), or white (pale green) biennial plant grown as an annual vegetable crop for its dense-leaved heads. It is descended from the wild cabbage (B. oleracea var. What is the importance of cabbage Cabbage, especially red cabbage, seems to raise levels of beta-carotene, lutein, and other heart-protective antioxidants. It also helps lower something called oxidized LDL, which is linked to hardening of the arteries. And since it eases inflammation, it can help prevent heart disease.