Table 1.

Overview of chemical diversity of dietary phytochemicals.

Phytochemicals		Types and Example
Group	Sub-Group
Polyphenols	Flavonoids	Flavanols : Catechin, Gallate & Epigallocatechin
		Flavonol : Quercetin, Gingerol & Kaempferol
		Flavones : Apigenin & Fisetin
		Isoflavonoids : Genistein
		Anthocyanidin
	Non-flavonoids	Phenolic acids: Hydroxybenzoic acid (Rosmarinic acid) & Hydroxycinnamic acids (Curcumin)
		Stilbenes : Resveratrol, Lignan
Carotenoids	β-Carotene, Lycopene, Crocetin
Glucosinolates	Isothiocyanates, Indole and Sulforaphane
Organosulphides	Allium compounds
Nitrogen compounds	Alkaloids	Caffeine, Codeine, Noscopine & Quinidine
	Capsaicinoids	Dihydrocapsaicin, Homocapsaicin, Capsaicin, Nonivamide
Terpenoids	d-Limonene, d-Carvone, Perillyl alcohol, Andrographolide, Excisanin A, Gnidimacrin, Oridonin, Cucurbitacin B