Quercetin is a naturally occurring bioflavonoid compound. Bioflavonoids are compounds that give color to fruits and vegetables, and are naturally found in foods such as apples, onions, green leafy vegetables, beans and citrus fruits. They can also be found in black and green teas, red wines and red grape juices. Some research studies suggest a positive link between quercetin intake and prostate function and health. Quercetin may help symptoms associated with prostatitis, as well as increase vitamin C absorption. Quercetin is also commonly supplemented to aid in joint health and for seasonal changes. Quercetin provides antioxidant protection from damaging free radicals and thus plays a natural role in maintaining optimal health. The addition of vitamin C, magnesium, bromelain, and bioflavonoids provide a complete formula for maximum results.