Quercetin is a kind of flavonoids, which can be found in plant foods. According to the research report of the American Cancer Society, quercetin has anti-cancer and anti-inflammatory properties. This means that this compound is beneficial to the prevention and treatment of cancer, allergies and other diseases, but its effects still need further research to verify. Many foods are known to contain quercetin.
Fruits
Fruits containing quercetin include apple peel, citrus fruits, grapes, black cherries and black berries. In particular, blueberries, blueberries and blackberries are particularly rich.
Vegetables and herbs
Herbs and vegetables containing quercetin include onions, fennel, green leafy vegetables and coriander.
Other food sources
In addition to the above foods, olive oil, tea, beans and red grapes are also food sources of quercetin.