Origin: May be derived from food sources such as capers, radish leaves, dill, cilantro, fennel leaves, onions, radicchio, watercress, kale, and plums.
Also Known As:
Overview: Quercetin is a plant flavonol from the flavonoid group of polyphenols. It is found in many fruits, vegetables, leaves, and grains; red onions and kale are common foods containing appreciable content of quercetin. Quercetin has a bitter flavor and is used as an ingredient in dietary supplements, beverages, and foods.
Common Dosage: 500 to 1000 mg per day