Table 2.

Polyphenol and secondary metabolite classification and dietary sources.

Classification		Structure	Major Dietary Sources
Flavonoids	Anthocyanins		Berries, grapes, cherries, plums, currants, pomegranates, red cabbage
	Flavanols		Apples, pears, legumes, tea, cocoa, wine
	Flavanones		Citrus fruits
	Flavones		Parsley, celery, orange, onions, tea, honey, spices, oregano
	Flavonols		Berries, apples, broccoli, beans, tea, asparagus, leafy greens, onions
	Isoflavones		Soy
Phenolic acids	Hydroxybenzoic acids		Pomegranates, grapes, berries, guava, blackcurrants, walnuts, chocolate, wine, green tea
	Hydroxycinnamic acids		Coffee, cereal grains, tea leaves, red onions
	Lignans		Flaxseed, sesame, barley, buckwheat, oats
	Stilbenes		Grapes, berries, red wine