Bioflavonoids have antioxidant properties, which allow them to absorb oxygen radicals that trigger skin oxidation. In additional,  they are  anti-microbial with anti-inflammatory action against microbially triggered skin irritations.

Proanthocyanidins, quercetin, citrus bioflavonoids, and green tea polyphenols are the 4 different types of bioflavonoids.

Proanthocyanidins (PCOs) are present in red wine and many plants, with grape seeds and maritime pine bark.

Quercetin flavonoid group is the most active of the flavonoids and are present in red wine, green tea, apples and berries.

Citrus bioflavonoids (such as rutin, quercitrin, hesperidin, and naringin) are present in oranges, limes and lemons.

Green tea polyphenols (such as catechin and epicatechin) are obtained by steaming the freshly cut leaf of Camellia sinensis or green tea.