Product name: Polygonum Cuspidatum Extract 
Part used: Root
Active ingredient:Resveratrol
Specification:10:1,20:1,Resveratrol 50%,98%
Appearance:Brown powder to white powder
Fallopia japonica, commonly known as Japanese knotweed,is a large, herbaceous perennial plant of the familyPolygonaceae, native to East Asia in Japan, China and Korea. In North America and Europe the species is very successful and has been classified as an invasive species in several countries.In Australia, it is illegal to have any of this species growing on your property