Giant Knotweed Extract: 

We have our own factory, which is professionally manufacturing various kinds of herbs, herbal
granule, slice, powder and herbal extract etc herbal products. 

Properties:
Product Name: Giant knotweed extract, Polygonum cuspidatum extract, Resveratrol
Latin name: Polygonum cuspidatum sieb.et Zucc
Chemical Name: Trans-resveratrol,5-[(E)-2(4-hydroxyphenyl)ethenyl]benzene-1,3-diol
Extract method: Supercritical CO₂ extraction
Appearance: White fine powder
Molecular Formula: C₁₄H₁₂O₃
Molecular Weight: 228.243
CAS No.: 501-36-0
Specification: Resveratrol 50%,98%
Packing: Packed in paper-drums and two plastic-bags inside or as per your request.
Net weight: 25kg/drum
Storage: Stored in a cool and dry well-closed container, keep away from moisture and strong light/heat. 

Description:
Resveratrol is a naturally occurring phytoalexin produced by some higher plants in response to injury or fungal infection. Phytoalexins are chemical substances produced by plants as a defense against infection by pathogenic microorganisms, such as fungi. Alexin is from the Greek, meaning to ward off or to protect. Resveratrol may also have alexin-like activity for humans. Epidemiological, in vitro and animal studies suggest that a high resveretrol intake is associated with a reduced incidence of cardiovascular disease, and a reduced risk for cancer. 

Function:
1. Anti-cancer;
2. Effect on cardiovascular system;
3. Anti-bacterial and anti-fungal;
4. Nourish and protect liver;
5. Anti-oxidant and quench free-radicals;
6. Impact on the metabolism of osseous issue.