Quercetin, a flavonoid (plant pigment), is naturally present in many foods including apples, tomatoes, cherries, berries, red wine, onions, green tea, kale, broccoli, Brussels sprouts and cauliflower, as well as Gingko biloba, American elder and St. John’s Wort. Considered one of the most abundant antioxidants in the human diet, quercetin plays an important part in fighting free radical damage, as well as the effects of aging and inflammation. Quercetin is used in natural medicine to promote circulatory health, provide immune support, and increase endurance and improve athletic performance.
[image:collage of flavonoid fruits & vegetables]
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