Polyphenols are the most abundant antioxidants in the diet. Their main dietary sources are fruits and plant-derived beverages such as fruit juices, tea, coffee, and red wine. Vegetables, cereals, chocolate, and dry legumes also contribute to the total polyphenol intake.
Polyphenols can be divided into four subgroups:
Bioflavonoids or Flavonoids, which give food their color
Anthocyanins and proanthocyanidins (OPCs), which are found primarily in berries.
Xanthones, which are primarily found in Gentain and Chinese skullcap nectars.
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