Reviews of epidemiological studies reported inverse
associations between intake of Brassica vegetables and the
risk of certain cancers [4, 5]. Isothiocyanates, one of the
GLS breakdown products, are assumed to lower the risk of
cancer by inhibiting phase 1 and inducing phase 2 enzymes
during carcinogen metabolism [6]. Upon damage of plant
tissue, GLSs are highly prone to hydrolysis catalysed by
myrosinase (β-thioglucosidase EC 3.2.1.147), an enzyme
that occurs in Brassica vegetables [2, 7].