Quercetin is a natural, plant-derived flavonoid 400 times more potent than vitamin E that protects against free radical damage. Additionally, Quercetin has been used for decades to help support a healthy cardiovascular and immune system. Another common use of Quercetin has to do with its ability to support the healthy response to occasional inflammation following sports activity. As Quercetin bioflavonoids are not easily assimilated through the gut wall, Dr. Peter J. D'Adamo has added Bromelain enzyme to the formula to enhance absorption. Our Quercetin formula is hypoallergenic, and it is derived from non-lectin containing sources. All blood types and GenoTypes can use Quercetin Plus.