Quercetin is an anti-oxidant, anti-inflammatory, and (possible) anti-viral found in a number of different fruits and vegetables – apples, tea, onion, citrus, tomato, broccoli, cherry, raspberry, cranberry, sea buckthorn, gingko biloba, olive oil, St John’s Wort, mango, and grapeseed oil.

Quercetin offers anti-inflammatory properties by inhibiting both the release and maintenance of histamine and other allergic mediators.

Read more about quercetin and rutin in this longer post on the topic!