ABSTRACT

Similarly, it has been shown that consumption of cruciferous vegetables is associated with a lower incidence of cancers. Induction of phase II enzymes such as the

glutathione

S

-transferase

(GST) and

quinone reductase

(QR) have been demonstrated in

broccoli

,

cabbage

, and

brussel sprouts

. Many natural isothiocyanates derived from cruciferous vegetables and some fruits have been shown to cause induction of phase II enzymes in cultured cells and rodents.