What Is Polygonum Cuspidatum Extract?
Polygonum Cuspidatum Extract is a botanical extract derived from the root or rhizome of Polygonum cuspidatum (also known as Japanese knotweed or giant knotweed). It is widely recognized as a natural source of resveratrol and related stilbenes, and is commonly used in the nutraceutical, pharmaceutical, cosmetic, and functional food industries.
As a high-value plant extract, Polygonum Cuspidatum Extract is often standardized to different resveratrol contents to meet varying formulation needs, such as 20%, 50%, 80%, and 99%. These standardized grades make it suitable for manufacturers seeking consistent raw material performance, reliable active content, and scalable production for international markets.
Botanical Source and Composition
Polygonum cuspidatum is a traditional medicinal plant with a long history of use in Asian herbal practice. The root is the primary commercial part used for extraction because it contains abundant bioactive compounds, especially resveratrol, polydatin, and other polyphenols.
Resveratrol, chemically known as trans-3,5,4'-trihydroxystilbene, belongs to the stilbene class of polyphenolic compounds. It occurs naturally in both trans and cis forms, and can also be found as glucosides. One important glucoside derivative is polydatin, also called resveratrol-3-O-beta-glucoside or piceid.
Product Overview
Product Name: Polygonum Cuspidatum Extract
Latin Name: Polygonum cuspidatum
Place of Origin: China
Part Used: Root
Extraction Type: Solvent Extraction
Active Ingredient: Resveratrol
CAS No.: 501-36-0
Molecular Formula: C14H12O3
Formula Weight: 228.24
Test Method: HPLC
Available Specifications
- Resveratrol 50% — Brown yellow powder
- Resveratrol 98% — White powder
Different specifications support different usage requirements across dietary supplements, cosmetics, and formulation development. Lower and mid-range standardized extracts are often selected for cost-effective bulk applications, while higher-purity grades are preferred where active content, dosage precision, or ingredient label clarity is important.
Manufacturing and Quality Control
Polygonum Cuspidatum Extract is produced through a controlled solvent extraction process designed to concentrate the active constituents from the root material. To support consistency in B2B supply, professional producers typically focus on raw material traceability, extraction efficiency, batch uniformity, and analytical verification.
For commercial buyers, the most important quality indicators generally include:
- standardized resveratrol content
- stable color and powder flow characteristics
- reliable batch-to-batch consistency
- HPLC-based assay control
- controlled moisture and impurity management
- traceable botanical sourcing
These factors are especially important for manufacturers, private label brands, and contract formulators that require predictable performance in production.
Functional Profile of Polygonum Cuspidatum Extract
Polygonum Cuspidatum Extract is valued primarily for its natural polyphenol profile, especially resveratrol. In formulation and ingredient development, it is often associated with antioxidant support and broader wellness positioning.
Common functional attributes linked to this botanical extract include:
- antioxidant activity
- cardiovascular support positioning
- support for healthy aging formulations
- applications in skin care and beauty-from-within products
- use in wellness products targeting general health maintenance
Because it is a plant-derived active ingredient, it is widely accepted in modern natural product formulations where clean-label, plant-based, and science-backed ingredients are preferred.
Resveratrol and Its Role in Formulation
Resveratrol is one of the key compounds responsible for the market demand of Polygonum Cuspidatum Extract. It is widely studied in scientific literature for its antioxidant potential and its relevance in nutritional and cosmetic applications.
In practical formulation terms, resveratrol is often used in:
- dietary supplements
- antioxidant blends
- cardiovascular health formulas
- anti-aging skincare products
- functional beverages and nutrition products
- encapsulated raw material systems
Depending on the intended application, formulators may choose different extract strengths to balance potency, cost, and compatibility with other ingredients.
Product Advantages
Polygonum Cuspidatum Extract offers several commercial and technical advantages for manufacturers and brand owners:
1. Natural Botanical Origin
It is derived from a plant source, making it suitable for natural and plant-based product positioning.
2. Standardized Active Content
Available in multiple resveratrol concentrations, it helps formulators achieve more precise active dosing.
3. Broad Market Versatility
It can be used across supplements, cosmetics, food-related applications, and pharmaceutical development projects.
4. Good Formulation Compatibility
As a powdered botanical extract, it can be incorporated into capsules, tablets, powder blends, and certain topical systems depending on the final product design.
5. International Market Demand
Polygonum Cuspidatum Extract and resveratrol remain in demand globally due to their relevance in health, wellness, and beauty categories.
Application Areas
Polygonum Cuspidatum Extract is widely used in multiple industries:
Dietary Supplements
It is commonly formulated into antioxidant, cardiovascular, and healthy aging products.
Cosmetics and Personal Care
It is used in anti-aging skincare, antioxidant creams, serums, and other topical formulations.
Functional Foods and Food Additives
It may be incorporated into nutrition-oriented products where botanical ingredients are desired.
Pharmaceutical and Research Use
It is used in ingredient development, formulation research, and functional health product innovation.
Technical Notes on Stability and Use
As with many polyphenol-rich botanical extracts, formulation performance can be influenced by processing conditions, packaging, light exposure, and storage environment. For best results, manufacturers typically evaluate compatibility with excipients, target dosage form, and final product stability requirements during product development.
For applications requiring improved handling or dosage precision, the selected extract grade should match the intended formula structure and manufacturing process.
Storage and Handling
To maintain product quality, Polygonum Cuspidatum Extract should be stored in a cool, dry place, away from direct light, heat, and moisture. Proper sealed packaging helps protect the extract during transportation and warehouse storage.
Quality Assurance and Supplier Reliability
For bulk buyers, ingredient quality is not only about active content but also about supply stability, documentation, and manufacturing discipline. A dependable Polygonum Cuspidatum Extract supplier should provide:
- consistent standardized specifications
- traceable botanical raw materials
- professional production control
- HPLC testing support
- stable supply capacity for international procurement
- responsive technical and commercial service
These capabilities are particularly important for importers, distributors, and contract manufacturers seeking long-term sourcing security.
Why Choose Extracts China Polygonum Cuspidatum Extract?
Extracts China focuses on supplying high-quality Polygonum Cuspidatum Extract with attention to consistency, customer service, and commercial reliability. We support B2B buyers with flexible order customization, practical product information, and responsive service for formulation and sourcing needs.
For companies looking for a dependable botanical ingredient supplier, Polygonum Cuspidatum Extract from Extracts China offers a strong combination of quality control, standardized active content, and market-oriented supply support.
