Additional elucidation:The specifications are as follows:Product name: giant knotweed extractBotanical name: polygonum cuspidatum siebPart used: rhizomeSpecification: 25%-98%Particle size: 80 meshesLo

We are amanufacturer,we produce resveratol(25%--98%)Packing:20kg/drum

We are a manufacturer,we produce resveratol(50%--98%).

Pure propolis: 20.0~30.0%Heavy metal:Packing:Drum

We produce propolis, there are propolis extract, propolis extract powder(50%---90%), propolis liquid and water-soluble propolis.

We are a manufacturer, we produce emodin(50%--90%), if you are interested in our products, pls kindly tell us.

Emodin: 98%, 90%, 50%, 25%