Brassica vegetables like broccoli (Brassica oleracea var.
italica), radish (Raphanus sativus L.), kale and cabbage (B. oleracea L.)
are rich in these antioxidants as well as glucosinolates, a group of
sulfur- and nitrogen-containing secondary metabolites, which have
attracted much attention in recent years because of the remarkable
anticarcinogenic activity of their major hydrolysis products,
isothiocyanates