Natural Fisetin Powder is extracted from stem of Cotinus coggygrial and Rhus succedanea. Fisetin is a flavonol, a structurally distinct chemical substance that belongs to the flavonoid group of polyphenols. We, Changsha Vigorous-tech Co., Ltd ,are committed to serving human health. Fisetin powder is good supplement for longevity life. Please feel free to contact us for free sample. FUNCTION 1. Anti-inflammatory and anti-proliferative; 2. Dispelling wind and humidity; 3. Promoting qi and blood circulation; 4. Anti-cancer, and anti-viral; 5. Food grade, pharmceutical grade; 6. Longevity life.