The positive health effect of brassica vegetables against various pathologies and chronic diseases, recently reviewed by Dinkova-Kostova and Kostov (2012), is widely recognised to be due to GLs, which act as precursors of bioactive isothiocyanates (ITCs), the products of hydrolysis mediated by plant endogenous myrosinase (β-thioglucoside glucohydrolase; E.C. 3.2.1.147) or by the intestinal microflora