Flavonoid subclasses and sources [20]
| Flavonoids | Sample polyphenols | Sources | |
|---|---|---|---|
| Simple flavonoids | Flavan-3-ols | (+)-catechins, (−)-epicatechin, (−)-epigallocatechin-3-gallate | Green tea, chocolate, tree fruits, grapes, red wine |
| Flavanones | Hesperetinnaringenin, eriodictyol | Citrus fruits and juices | |
| Flavones | Luteolin, apigenin | Parsley, celery seed, oregano | |
| Isoflavones | Daidzein, genistein, glycitein | Soybeans, soy-based foods | |
| Flavonols | Quercetin, kaempferol, myricetin, isorhamnetin | Onions, apples, tea, berries | |
| Anthocyanidins | Cyanidin, delphinidin, malvidin, pelargonidin, peonidin, petunidin | Most berries, stone fruits | |
| Complex flavonoids | Condensed tannins (proanthocyanidins) | Procyanidins, prodelphinidins, propelargonidin | Chocolate, stone fruit (apples, pears), grapes, strawberries, cranberries, nut skins, cinnamon, beer, wine |