Shaanxi Huifeng Pharmaceutical Ltd.

Quercetin is a phytochemical that is part of the coloring found in the skins of sophora japonicas and red onions.It has been isolated and is sold as a dietary supplement.Quercetin is a powerful antioxidant.It is also a natural anti-histamine,and anti-inflammatory.Research shows that quercetin may help to prevent cancer,especially prostate cancer.