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Quick Details

  • Type: Giant Knotweed Extract
  • Form: Powder
  • Part: Root
  • Extraction Type: Solvent Extraction
  • Packaging: Drum, Vacuum Packed
  • Place of Origin: Hunan, China (Mainland)
  • Grade: Pharmaceutical Grade
  • Brand Name: Greenland
  • Model Number: 100% Nature
  • Latin Name: Polygonum Cuspidatum Sieb. et Zucc. extract
  • Specification: 5%-98% Resveratrol
  • CAS No.: 501-36-0
  • Molecular formula: C14H12O3
  • Molecular Weight: 228.25
  • Certificate: ISO9001/HACCPl/Kosher/GMP
  • Test Method: HPLC
  • Appearance: Brownish or White powder
  • Exytract Solvent: Ethanol & Water
  • Shelf Life: 2 years with proper storage

Packaging & Delivery

Packaging Details 1kg: Aluminum foil bag with double plastic bags inside .
5-20kg: Carton with double plastic bags inside.
25kg: Paper-drum with double plastic bags inside.
Delivery Time 1 working day after payment confirmed

  100% Natural Giant Knotweed Extract 50-98% Resveratrol

Product Description


 Product Name Giant Knotweed Extract
 Latin Name Polygonum Cuspidatum Sieb. et Zucc.
 Specification  50-98% Resveratrol
 Plant Part  Root
 Apperance Fine Brown Powder
 Test Method HPLC
 Shelf Life 2 Years if sealed and store away from direct sunlight.

 Store in a well-closed container away from moisture. Storage at <30°C recommended.

 Total Plate Count  NMT1000cfu/g
 Yeast & Mould NMT100cfu/g
 Heavy Metals NMT10ppm


(1) Resveratrol is naturally occurring phytoalexin produced by some higher plants in response to injury or fungal in fection. Phytoalexins are chemical substances produced by plants as a defense against in faction by pathogenic microorganisms, such as fungi. Alexin comes from the Greek, meaning to ward off or to protect.


(2) Resveratrol  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


(3) Resveratrol is extracted from Polygonium cuspidatum and grape skin, its rich with Both cis - resveratrol and trans-resveratrol.



(1) Antibacterial, anti-thrombotic, antiinflammatory and anti-anaphylaxis.

(2) Preventing cancer, especially in breast cancer, prostate cancer, endometrial cancer and ovary cancer due to its estrogen role.

(3) Anti-oxidation, delaying aging, preventing osteoporosis, acne and dementia in the elderly. (4) Lowering cholesterin and blood viscosity,reducing the risk of arteriosclerosis, cardio-cerebrovascular disease and heart disease.

(5) Owning good efficacy for treatment of AIDS.


(1) Applied in food field, it's widely used as food additive with the function of lengthening life.

(2) Applied in pharmaceutical field, it is frequently used as medicine supplement or OTC ingredients and owns good efficacy for treatment of cancer and cardio-cerebrovascular disease.

(3) Applied in comestics industry, it can delay aging and prevent UV radiation.

Packaging & Shipping




Company Information
Hunan Greenland Plant Resource Development Co., Ltd is a market-oriented and research-driven manufacturer and supplier of natural ingredients (botanical extracts/ herbal extracts and herbal formulations) for the Industries of Dietary Supplements, Functional Foods, Functional Beverages, Cosmetics and Pharmaceuticals. We can offer value-added services: Concept Development/ Formulation Assistance, Clinical Trial Support, and Private Labels/ Contract Manufacturing.
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Q: Why choose GREENLAND ? Any advantages ?

A: The answer is Yes. There are 4 advantages. 

      1. Manufacturer direct supply

      2. High quality

      3. Competitive price

      4. Free sample


Q: Can I get the sample to test the quality?

A: Yes, We recommend to check the sample before order. Please order the sample from us.


Q: If I order big quantity, what's the good price?

A: You can buy it more cheaply if you buy in bulk. Please send the details enquiry to us, such as the Item Number, Quantity for each item, Quality request, Payment Terms, Transport method, Discharge place etc. We will make the accurate quotation to you as soon as possible.


Q: What's your work schedule?

Our normal work time is ?

8:30-17:30 at Beijing time.


Q: How to contact us?



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China (Mainland) | Manufacturer, Trading Company
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