Quercitin is a bioflavonoid. Bioflavonoids are nutrients that are found in some fruits and various leafy green vegetables, among other things. Specifically, quercitin is naturally present in teas, both green and black, apples, onions, and beans. Red wine is also a rich source of this nutrient. Bioflavonoids are potent nutrients that help maintain the health of collagen. Collagen is responsible for the firmness and health of our largest organ -- our skin. Indeed, wrinkles and sagging is the direct result of the breakdown of collagen. Quercitin, along with other bioflavanoids, can also improve the health of capillaries and connective tissues. Because of this, the many benefits of quercitin include alleviating bruising, edema, varicose veins, and fragile capillaries. Other benefits include its ability to inhibit the release of histamine. As such, it is said to help mitigate conditions brought on by some type of allergin (ex. eczema, asthma, hay fever, etc) and has been ascribed anti-inflammatory properties.