Product Introduction

Polygonum Cuspidatum Extract (Resveratrol) is a natural active ingredient extracted from the dried rhizome and root of Polygonum cuspidatum (or Reynoutria japonica), a perennial shrubby herbaceous plant in the family Polygonaceae. It is native to East Asia and widely cultivated in central and southern China, including Jiangsu, Jiangxi, Fujian, Shandong, Henan, Shaanxi, and Sichuan provinces.

Resveratrol appears as colorless needle-like crystals, is sparingly soluble in water, and freely soluble in organic solvents such as ethanol and acetone.
It has a melting point of 256–257℃- and is unstable under alkaline conditions (pH > 10), turning pink or red.

Common specifications for Polygonum Cuspidatum Extract (Resveratrol) include: 20%, 50%, 80%, 98%. Among these, 50% and 98% are the mainstream specifications on the market.
Custom specifications ranging from 5% to 99% are also available from some manufacturers.
Product Specification
|
Ratio/Assay |
Test Method |
Powder Color |
| 20%-98%Resveratrol |
HPLC |
White fine powder |
Product Analysis
|
Item |
Specification |
|
Product Name |
Polygonum Cuspidatum Extract |
|
Appearance |
White fine powder |
|
Moisture |
≤ 5.0% |
|
Ash |
≤ 5.0% |
|
Heavy Metals |
≤ 10ppm |
|
Lead (Pb) |
≤ 2 ppm |
|
Arsenic (As) |
≤ 1 ppm |
|
Mercury (Hg) |
≤ 0.1 ppm |
|
Cadmium (Cd) |
≤ 0.5 ppm |
|
Total Plate Count |
≤ 1000 cfu/g |
|
Yeast & Mold |
≤ 100 cfu/g |
|
E. coli |
Negative |
|
Salmonella |
Negative |
|
Packaging |
25kg/drum or according to customer's requirements |
|
Shelf Life |
24 months |
|
Storage |
Store in a cool, dry place, keep away from strong light and heat. |
Product Function & Application
Function:
1. Antioxidant Activity
Resveratrol is a potent natural antioxidant with significant antioxidant and free radical scavenging effects. Its antioxidant capacity helps protect cells from oxidative stress damage.
2. Cardiovascular Protection
Reduces blood viscosity and inhibits platelet aggregation
Promotes vasodilation and maintains healthy blood circulation
Lowers cholesterol levels
Anti-atherosclerotic effects; prevents coronary heart disease and ischemic heart disease
Helps prevent and treat hyperlipidemia
3. Anti-tumor Effects
Exhibits anti-tumor activity and may help prevent the occurrence and progression of cancer. Shows preventive effects against breast cancer, prostate cancer, endometrial cancer, and ovarian cancer.
4. Anti-inflammatory and Antimicrobial Effects
Possesses antibacterial, antiviral, anti-inflammatory, and anti-allergic properties. Demonstrates anti-inflammatory effects against gouty arthritis.
5. Other Benefits
Anti-aging: Antioxidant properties
Neuroprotection: Potential preventive effects against Alzheimer's disease
Skin Whitening: Inhibits tyrosinase activity, exhibiting skin whitening effects
Estrogenic Activity: Exhibits estrogen-like effects
Application:
1. Food Industry
Used as a food additive and nutritional fortifier
Applicable in functional foods and health foods
Promotes health and longevity
2. Pharmaceutical Industry
Used as a pharmaceutical ingredient or over-the-counter (OTC) component
Adjunctive treatment for cardiovascular diseases and cancer
Used in cardiovascular health supplements
3. Cosmetic Industry
Used in anti-aging skincare products
Provides UV protection
Exhibits skin whitening effects
Used in topical skincare formulations
4. Nutraceutical / Dietary Supplement Industry
Used in dietary supplements and nutritional health products
Used in metabolic syndrome intervention formulations

Why Choose US?
Changsha Heking Bio-tech Co.,Ltd. entered into the plant extraction industry in 2008 and was established in 2011.
At Heking, we specialize in producing high-quality plant extracts, providing natural solutions for a wide range of industries,
including pharmaceuticals, cosmetics, food and beverage, and dietary supplements.
- Customer Satisfaction:We are committed to providing high-quality services that exceed our customers' expectations.
- Competitive prices: We offer competitive prices for our services without compromising on quality. Our prices are transparent, and we don't believe in hidden charges or fees.
- One-stop service: We promise to provide you with the fastest reply, the best price, the best quality, and the most perfect after-sales service.
- Fast delivery time: We choose high-quality raw materials.We have Stable product inventory and mass production within 7 days.
- Factories and warehouses: Our headquarters is in China and we have two professional plant extract factories. Besides, we also have an office and a warehouse in Los Angeles, USA.
- Quality assurance: Internationally authorized third-party testing for the products you need. We are cGMP, FDA, FSSC22000, Halal, ISO9001, Kosher, Organics certified.

FSSC 22000

ISO 9001

USDA Organic

EU Organic

Halal

Vegan Su


Our office

Our factories



Deliver & Shipping
We accept international express - Fedex/DHL/UPS, air and sea, we can ship all over the world, even to some remote areas, such as remote areas of Russia, countries near the North Pole and Antarctic.
|
Cargo weight |
Packing |
Shipping method |
Lead-time |
|
5-50kg |
Below 5kg Use Foil bag; 5-50kg, Pack in paper-drums and two plastic-bags inside |
International express |
7-10days |
|
100-200kg |
25kg/drum,Pack in paper-drums and two plastic-bags inside |
Air shipping |
7-10days |
|
Over 500kg |
25KG/drum,Pack in paper-drums and two plastic-bags inside |
Sea shipping |
30-45days |

FAQ
Q1:Can I get some samples?
A:Yes, we can provide free samples, and you only need to pay the freight.
Q2:How to start orders or make payments?
A:After confirming your order, we will send you a proforma invoice with the bank information. The payment methods are as follows: Payment by T/T, Paypal, Check...
Q3:What's your MOQ?
A:Our MOQ is 1kg. But usually according to different products, the specific MOQ will vary.
Q4:What about the delivery time?
A: Within 7 days after receiving the payment.
Q5: Are there any discounts?
A: Different quantities have different discounts.
Q6: How do you handle quality complaints?
A: First, our quality control will reduce quality problems to close to zero. If there is indeed a quality problem caused by us, we will send you the goods for replacement or refund your loss free of charge.
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