Quercenase combines bromelain, a compound of protein-digesting enzymes, with a highly absorbable form of quercetin.* Quercetin appears to have many beneficial effects on human health, including support of the gastrointestinal tract and the cardiovascular system, where it scavenges free radicals.*Thorne's Quercenase combines quercetin phytosome (quercetin bound to sunflower-sourced phospholipids, which increases the body's ability to absorb the quercetin) and bromelain, a compound of protein-digesting enzymes derived from the pineapple plant.* Bromelain also has immune-supporting properties because it contains constituents that help maintain a healthy cytokine balance.**