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Product name: giant knotweed p.e. product specification: 50%, 98%, 99% resveratrol latin name: polygonum cuspidatum product type: powdered extract part of the plant used: root & rhizome extract method: grain alcohol cas#: [501-36-0] what is resveratrol ? 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.. bio-resveratroltm is extracted from polygonium cuspidatum, its rich with both cis- resveratrol and trans-resveratrol. where will be resveratrol use to ? anti-cancer effect on cardiov