Table 2.
The classes and subclasses of flavonoids, and plant sources rich in flavonoids¹

Flavonoid classes	Subclasses of flavonoid	Plant sources
Flavanol	Catechin, epicatechine, gallo-cachechin, epiballocatechin (ECG), epicathechin-3 gallate (EGC)	Apricot, apple, cocoa, red wine, tea, plum, cherry
Anthocyanidins	Cyanidin, malvidin, petunidin	Grapes, berries (black, blue), cherries, eggplant
Flavanone	NAringenin, eridictyol, prunin	Grapefruit, orange, lemon
Flavonol	Kaempferol, quercetin, rutin	Green tea, onion, broccoli, kale, leek, asparagus
Isoflavone	Diadzein, genistein	Soybean, legumes, chickpea
Flavone	Apigenin, luteolin	Celery, parsley, carrot
Chalcone	Naringenin, chalcone	Ginger, mulberry, apple, soybean

Adapted from Shen et al. (2022).