Premium Polygonum Cuspidatum Extract: Standardized Trans-Resveratrol for Nutraceutical, Cosmetic, and Functional Food Applications
The Extract Factory stands as a distinguished manufacturer and supplier of high-quality Polygonum Cuspidatum Extract, delivering standardized botanical ingredients that meet the exacting demands of global nutraceutical, cosmetic, and food formulation industries. With a steadfast commitment to quality, transparency, and competitive wholesale pricing, we provide bulk resveratrol solutions engineered for manufacturers, formulators, and distributors seeking reliable, science-backed raw materials.
Botanical Source and Raw Material Provenance
Polygonum Cuspidatum, widely recognized as Japanese Knotweed or Huzhang (虎杖), is a perennial herb native to East Asia and now extensively cultivated across China’s mountainous regions. The Extract Factory sources mature rhizomes from certified agricultural partners operating in pollution-free growing zones, ensuring optimal phytochemical accumulation prior to harvest. Each lot is assigned a unique batch identifier, enabling full traceability from raw botanical to finished extract powder.
Extraction, Isolation, and Purification Philosophy
Our production workflow integrates advanced botanical extraction techniques with rigorous chromatographic purification. Dried Polygonum Cuspidatum roots undergo controlled milling and solvent extraction to liberate stilbene glycosides, including the precursor polydatin. Subsequent hydrolysis and recrystallization processes isolate the biologically active trans-resveratrol isomer while systematically removing undesirable co-extractives. The result is a highly refined botanical extract characterized by exceptional batch-to-batch consistency and minimal environmental contaminants.
Active Constituent Profile and Chemical Identity
The principal bioactive marker in Polygonum Cuspidatum Extract is resveratrol (3,5,4′-Trihydroxystilbene), a naturally occurring polyphenolic stilbenoid extensively documented for its antioxidant, anti-inflammatory, and cellular protective properties. Within our premium extract lines, the predominant isomer is trans-resveratrol, recognized as the most therapeutically relevant form due to superior bioactivity compared with its cis counterpart. We offer flexible standardization, including 50% and 98% resveratrol concentrations, with our flagship grade guaranteeing a minimum 98% trans-resveratrol assay by High-Performance Liquid Chromatography (HPLC).
Physical and Chemical Specifications
- Appearance: White to off-white crystalline powder
- Odor: Practically odorless
- Taste: Characteristic, slightly astringent
- Solubility: Standard grades exhibit limited aqueous solubility; specialized water-soluble formats are available upon request for beverage and transparent cosmetic serum applications
- Particle Size Distribution (D90): 85 µm, facilitating satisfactory flowability and dissolution profiles
- Loss on Drying: 1.5%
- Moisture Content (Karl Fischer): 1.2%
Analytical Certificate of Quality and Compliance
Every manufacturing run is subjected to comprehensive in-house and third-party laboratory testing. Representative quality parameters for our 98% trans-resveratrol grade include:
Identification and Purity
- HPLC Identification: Conforms to reference standard
- Assay (Resveratrol): 98.0% – 102.0% specification range; actual result 98.5%
- Purity (HPLC): 98.5%
- Related Substances: 0.8% (limit: ≤ 1.0%)
Safety and Compliance
- Heavy Metals (as Pb): < 5 ppm (limit: ≤ 10 ppm) by ICP-MS
- Arsenic (As): < 1 ppm (limit: ≤ 2 ppm) by ICP-MS
- Residual Solvents: < 50 ppm (limit: ≤ 1000 ppm) by GC
Microbiological Standards
- Total Aerobic Plate Count: 120 CFU/g (limit: ≤ 1000 CFU/g)
- Yeast and Mold: < 10 CFU/g (limit: ≤ 100 CFU/g)
- Escherichia coli: Negative
- Salmonella spp.: Negative
All testing methodologies align with USP/EP reference standards and established in-house Standard Operating Procedures (SOPs). Our facilities operate under ISO and cGMP frameworks, and select product lines maintain Kosher certification status.
Why Formulators and Procurement Teams Choose Our Polygonum Cuspidatum Extract
1. Clinically Relevant Purity with Ultra-Low Anthraquinone Burden
Raw Japanese Knotweed root naturally contains emodin and related anthraquinones, which may exert laxative effects and compromise gastrointestinal tolerability in sensitive end-users. Our advanced purification protocols consistently reduce emodin content to levels typically below 0.1%, mitigating formulation risks and improving consumer compliance.
2. Guaranteed High trans-Resveratrol Standardization
We specify and verify the trans-resveratrol isomer rather than merely reporting total resveratrol content. This analytical precision ensures that finished supplement and skincare products deliver the bioactive form most extensively validated in scientific literature.
3. Application-Specific Solubility Solutions
Recognizing that conventional resveratrol presents formulation challenges in aqueous systems, The Extract Factory produces enhanced-dispersion and water-soluble grades. These variants integrate seamlessly into liquid nutraceuticals, functional beverages, parenteral cosmetic matrices, and clear topical serums that would otherwise be incompatible with standard lipophilic extracts.
4. End-to-End OEM and Custom Manufacturing Expertise
Drawing upon nearly two decades of extraction and formulation science, our technical team collaborates directly with client R&D departments. Whether optimizing capsule dry blends, developing stability-tested emulsions, or engineering sustained-release matrices, we apply nuanced knowledge of resveratrol’s photochemical sensitivity and oxidative vulnerability to decompose project timelines and accelerate market readiness.
Industry Applications and Usage Guidelines
Dietary Supplements and Nutraceuticals
Polygonum Cuspidatum Extract serves as a foundational ingredient in anti-aging complexes, cardiovascular support formulas, cognitive health supplements, and systemic antioxidant protocols. The recommended serving range for standalone resveratrol supplementation typically falls between 100 mg and 500 mg per serving, depending on intended positioning and co-formulation strategy. For enhanced bioavailability, formulators frequently pair resveratrol with piperine (black pepper extract) or lipid-delivery systems.
Functional Foods and Beverages
In the functional food sector, resveratrol fortifies energy drinks, fortified nutritional bars, and anti-aging wellness shots. Typical inclusion rates range from 0.5% to 2% by weight, adjusted for desired antioxidant activity, taste profile, and solubility grade selection.
Cosmetics and Dermocosmetic Formulations
The potent free-radical scavenging and anti-inflammatory properties of trans-resveratrol make it highly desirable in premium skincare. It is incorporated into anti-aging creams, UV-defense serums, redness-relief lotions, and overnight repair masks. Recommended use levels in topical preparations range from 0.5% to 3%. At higher concentrations, preliminary patch testing is advised to assess individual skin tolerance.
Stability, Storage, and Shelf-Life Considerations
Resveratrol exhibits established sensitivity to ultraviolet light, elevated thermal exposure, and atmospheric oxygen. To preserve potency across the supply chain:
- Store bulk powder in tightly sealed, opaque containers purged with inert gas where feasible
- Maintain warehouse and transport conditions below 25°C (77°F) in dry environments
- Protect from direct sunlight and fluorescent light exposure
- Avoid prolonged contact with strongly alkaline pH environments, which may degrade the stilbene structure
For finished goods, amber or UV-opaque packaging is strongly recommended, particularly for liquid and semi-solid dosage forms.
Packaging, Supply, and Logistics
The Extract Factory supplies Polygonum Cuspidatum Extract in industrial packaging configurations designed for wholesale and contract manufacturing operations. Standard offerings include 25 kg fiber drums lined with multi-layer polyethylene bags, with alternative packaging available upon request to meet specific GMP warehousing or automated dispensing requirements. We accommodate scalable order volumes, from pilot-scale ingredient evaluation through multi-ton annual procurement contracts.
Global Wholesale Supply and Partnership
Selecting The Extract Factory as your Polygonum Cuspidatum Extract supplier means partnering with a technically oriented botanical ingredient house that prioritizes analytical transparency, supply continuity, and formulation success. Our concentrated resveratrol powders, verified ultra-low emodin specifications, and collaborative OEM capabilities provide the commercial and scientific foundation necessary for competitive product differentiation.
To request a quotation, technical data sheet, or stability-tested sample, contact our procurement and technical sales team directly at [email protected]. We welcome the opportunity to support your next large-scale project with consistent, high-integrity plant extract solutions.
