Fig. 2.

Dietary sources of chemo-preventive dietary phytochemicals.

Dietary polyphenols, carotenoids, terpenoids, glucosinolates, organosulphides and nitrogen containing compounds exhibit potent chemo-preventive activity against several cancers. Dietary polyphenols such as curcumin, resveratrol, quercetin, kaempferol, EGCG and carotenoids like β-carotene and lycopene exhibit potent chemo-prevention. In addition to this, glucosinolates and organosulphides such as sulforaphane also demonstrate potent anti-cancer efficacy. Nitrogen containing compounds like codeine and noscapine also display potent anti-cancer efficacy in several cancer cells.