Quercetin is a Citrus Bioflavonoid - a natural substance found in plants, fruits, vegetables, nuts, bark, and buckwheat. Citrus Bioflavonoids help protect capillaries, prevent bruising, and intensify the effect of vitamin C in the body. In fact, Bioflavonoids are essential for total vitamin C effectiveness. Citrus Bioflavonoids provide natural antiviral, anti-inflammatory and anti-allergy properties. In addition, certain bioflavonoids are beneficial for fighting infections, free radical damage, viruses, and common colds. Bioflavonoids have also been used to help alleviate symptoms related to allergies and respiratory conditions. Citrus Bioflavonoids are sometimes considered vitamins because they possess the properties of a vitamin, and are sometimes referred to as vitamin P. They are found in several forms, including hesperidin, eriodictyl, quercetin, rutin, and hesperitin. They cannot be produced by the body, and therefore have to be taken as dietary supplements.

Xi`an Huifeng Biochemistry Joint Stock Corp. is the leading manufacturer of herb/botanical extracts in China with Iso9000 certified. We can supply Quercetin 98%.