As a new-type foreign trade service provider driven by both technology transformation and foreign trade services, HiSiaddi has established a "1+2+3+4=1" service system and can supply raw materials of trans resveratrol from many well-known original manufacturers. Having deeply engaged in the trans resveratrol foreign trade market for over a decade, HiSiaddi sorts out key points requiring attention for global sourcing and product selection, shared below for your reference.
If you have inquiries about trans resveratrol sourcing, product selection or other related questions, please contact HiSiaddi customer service or visit our official website: www.hisiaddi.com.
Common Name: Giant Knotweed Root Extract, Trans-Resveratrol CAS No.: 501-36-0 Molecular Formula: \(\boldsymbol{C_{14}H_{12}O_3}\) Molecular Weight: 228.24 Active Configuration: Trans-resveratrol (cis-resveratrol has extremely low activity and is easily generated under UV light or high temperature) Raw Material: Dried rhizome of Polygonum cuspidatum (Japanese knotweed); the mainstream natural extraction raw material worldwide, with far higher content than grape pomace Main Specifications: 50%, 98%, 99% HPLC; 98%/99% high-purity grades are standard for cross-border health supplements Appearance: Off-white to pale beige fine powder; liposoluble; microcapsule versions are cold-water dispersible Core Regulatory Standards: USP-NF, FCC, T/CCCMHPIE 1.7-2016 Group Standard for Giant Knotweed Extract, FDA Self-GRAS, EU Novel Food Regulation (EU) 2022/672, USDA/EU Organic, FSSC22000, KOSHER/HALAL
Process Flow: Crush giant knotweed rhizomes → Cellulase hydrolysis to convert polydatin → Low-temperature ethanol countercurrent extraction → Macroporous resin purification → Activated carbon decolorization to remove emodin → Vacuum low-temperature recrystallization Advantages: Trans-isomer proportion ≥98.5%; ultra-low emodin and solvent residues; can be labeled "Natural Plant-Derived"; consistent batch quality; no strong acid/alkali degradation; suitable for European & American organic dietary supplements and oral special medical foods Disadvantages: Moderately high production costs; requires GACP-certified organic planting bases for traceability
Process Flow: High-temperature ethanol reflux extraction → Single round of resin purification → Simple crystallization Disadvantages: High residual emodin; elevated cis-isomer content; ethanol residues range from 500–800 ppm; obvious batch-to-batch color deviation; only applicable for low-cost domestic health supplements and general food products
Produced via high-temperature hydrolysis with strong acids, featuring excessive cis-isomers, heavy metals, plasticizers and aflatoxin risks. Only used for aquafeed and industrial additives; banned for edible food and cross-border export for human use.
1. Giant Knotweed Extraction: High trans-resveratrol content, large-scale production and moderate costs; contains polydatin and trace emodin; eligible for natural plant labeling; dominant raw material for global dietary supplements. Exports to the EU require strict control of emodin, pesticide residues and PAHs.
2. Grape Pomace Extraction: Extremely low resveratrol content, high costs and unstable batch consistency; marketed primarily for polyphenol content; niche application in high-end skincare, unsuitable for high-purity oral raw materials.
3. Chemically / Yeast-Synthesized Resveratrol: Free of plant impurities and emodin; cannot be labeled as natural plant extract; forbidden for organic brands; exclusively used as pharmaceutical APIs, with completely separate labeling compliance standards from giant knotweed extracts.
1. Premium Organic Cross-Border Dietary Supplements (Europe & North America): Anti-aging, eye care, cardiovascular health and mitochondrial composite capsules & powders (98%/99% enzymatically refined high-purity grade mandatory)
2. Functional Foods & Beverages: Anti-aging gummies, meal replacement shakes, oral liquids (water-dispersible microcapsule formulation)
3. Oral Pharmaceutical APIs & Special Medical Foods: USP 99% high purity, low endotoxin, ultra-low emodin, for oral antioxidant preparations
4. Skincare & Livestock Feed: Relaxed impurity limits for cosmetics; crude industrial giant knotweed powder solely for feed, prohibited for human consumption and export
表格
Grade | Mandatory Production Process | HPLC Dry-Basis Trans-Resveratrol Content | Trans-Isomer Proportion of Total Resveratrol | Emodin Residue | Loss on Drying | Pb Heavy Metal Limit | Core Controlled Impurities | Applicable Scenarios |
Pharmaceutical / Organic High-Purity Grade (Premium European & American Standard) | Enzymatic Low-Temp Extraction + Triple Membrane Separation | 98.0~99.0% | ≥98.5% | ≤0.05% | ≤0.3% | ≤0.1ppm | Cis-isomer ≤1%, ethanol residue ＜500ppm, no detectable pesticides or PAHs | Organic health supplements, infant special dietary foods, oral pharmaceutical APIs |
Standard Organic Food Grade (Mainstream Cross-Border Grade) | Secondary Refining after Enzymolysis | 98.0~101.0% | ≥97.0% | ≤0.10% | ≤0.5% | ≤0.5ppm | Total impurities ≤0.2%, undetectable pesticides | General European & American dietary supplements, organic functional foods |
General Bulk Food Grade (Domestic Low-Cost Standard) | Single Purification via Ethanol Reflux | 50%/98% | ≥93.0% | ≤0.30% | ≤1.0% | ≤2.0ppm | Total impurities relaxed to 0.5% | Domestic health supplements, baked goods, dairy products |
Industrial Crude Feed Grade | Acid-Alkaline Crude Hydrolysis without Deep Purification | ≤95% | No mandatory control | ＞0.5% | ≥1.5% | ≤10ppm | Excessive cis-isomers, heavy metals and solvent residues | Aquaculture feed, industrial additives; strictly forbidden for human edible food exports |
1. HPLC Quantification of Total Trans-Resveratrol + Cis/Trans Isomer Ratio: Core marker of efficacy. Premium grades require trans-isomer ≥97%; products below 93% trans-isomer suffer drastically reduced efficacy. Suppliers must provide full isomer chromatograms.
2. Emodin (Exclusive High-Risk Impurity for Giant Knotweed; EU Regulatory Red Line): High doses cause liver and kidney irritation. Organic/pharmaceutical grade limit ≤0.05%; excess levels lead to direct seizure and destruction of goods by EU customs.
3. Loss on Drying: Moisture above 1% accelerates photoisomerization to form inactive cis-resveratrol; pharmaceutical grade limit ≤0.3%.
4. Heavy Metals (ICP-MS): Tiered control for Pb, As, Cd, Hg; Pb ≤0.1ppm for European & American organic grades, complying with EC 1881/2006.
5. Ethanol Residue (Headspace GC): Premium enzymatically refined grades ＜500ppm; crude reflux materials often exceed 800ppm.
6. Pesticide Residues & PAHs (Mandatory for USDA/EU Organic Certification): Giant knotweed rhizomes readily accumulate soil pesticides; organic raw materials must test non-detectable.
7. Microbiological Testing (Oral Grade): Organic/pharmaceutical grade: total aerobic bacteria ≤100 CFU/g, free of mold and pathogenic bacteria; general food grade ≤30,000 CFU/g, negative for Salmonella and Staphylococcus aureus.
8. Aqueous Solution Clarity (1% Ethanol Solution): Cloudiness indicates incomplete impurity removal or adulteration with polysaccharides/inorganic salts.
1. Synthetic/yeast-derived resveratrol misrepresented as natural giant knotweed extract; failure to provide giant knotweed planting traceability or plant fingerprint chromatograms carries heavy fines for false natural labeling in Europe and North America.
2. Acid-alkaline hydrolyzed feed-grade material diverted into oral consumption channels, with triple violations of excessive emodin, cis-isomers and solvent residues.
3. Labeling only total resveratrol while concealing cis-isomer proportions, with falsely stated trans-resveratrol content; no HPLC isomer chromatograms provided.
4. Yellowed, caked powder; trans-resveratrol content declines over 10% after 3 months storage due to non-lightproof, non-nitrogen-flushed packaging prone to photodegradation.
5. Absence of full third-party SGS/CMA Certificates of Analysis (COA), missing dedicated testing for emodin, pesticides, PAHs and isomer ratios.
6. Claimed organic status without GACP planting bases or USDA/Ecocert organic certificates, and no raw material origin traceability.
7. 50% low-purity crude powder adulterated with maltodextrin/glucose to fake 98% high-purity material, featuring messy miscellaneous peaks on HPLC chromatograms.
China accounts for 78% of global giant knotweed extract production capacity, concentrated in Hunan, Shaanxi and Sichuan Qinba Mountain regions. Europe and America only conduct small-scale grape extract repackaging; domestic FOB prices are 50%~80% lower.
1. Core Enterprises
1. Indena (Italy): Benchmark botanical extract manufacturer, supplying enzymatically refined 98% giant knotweed extract with complete EU organic, NDI and USP compliance plus full human clinical data; exclusively serves European organic health supplements and hospital special medical foods.
2. NutriScience (USA): North American dietary raw material leader, supplying organic giant knotweed extract with complete Self-GRAS documentation and robust GACP traceability systems.
3. Lycored (Israel): Premium natural antioxidant raw material supplier with dual organic giant knotweed and grape extract lines, specializing in high-end skincare formulations.
2. Advantages: Extreme control over impurities and pesticide residues; one-stop delivery of full customs clearance registration documents; minimal batch-to-batch variation.
3. Disadvantages: FOB prices 60%~90% higher than domestic Chinese alternatives; minimum order quantity ≥15 tons; sea transit time 45~60 days with no spot inventory.
4. Target Clients: North American premium organic capsule brands, EU hospital oral special diets, high-end organic skincare brands.
Leading domestic manufacturers operate self-owned GACP organic planting bases, GMP, FSSC22000, ISO22000, USDA/EU Organic, KOSHER/HALAL certifications; can issue REACH and full SGS inspection reports, with minimum order quantity 5 tons and delivery lead time 3~7 days. Dual production lines for enzymolysis and traditional extraction; custom 800-mesh water-dispersible microcapsules available.
1. Leading Manufacturers List
1. Changsha Huirui Biotechnology: Domestic giant knotweed extraction leader with self-owned organic giant knotweed planting bases in Hunan; supplies enzymatically refined 98%/99% high-purity grades with Self-GRAS certification, the primary bulk exporter to Europe and North America.
2. Shaanxi Hongda Biotechnology: Controlled planting in the Qinba Mountains, with supercritical CO₂ assisted enzymolysis for ultra-low emodin and solvent residues; top-selling raw material for cross-border organic products.
3. Xi’an Luman Biotechnology: Drafting unit of the T/CCCMHPIE giant knotweed standard, full coverage of 50%/98% specifications, main supplier for low-cost Southeast Asian markets.
4. Vidacon Biotechnology: Specializes in water-soluble microencapsulated giant knotweed resveratrol, ideal for transparent oral liquids and children’s gummies with no precipitation when mixed with cold water.
2. Segment Advantages: Domestic enzymatically refined high-purity grades match Indena and NutriScience specifications, with FOB Shanghai/Ningbo costs reduced by 40%~65%; supporting compound formulation packages (resveratrol + glutathione + lutein anti-aging blends).
3. Target Clients: Global mid-to-high-end cross-border health supplements, functional foods, domestic pharmaceuticals, RCEP zero-tariff Southeast Asian markets.
1. Characteristics: No self-owned giant knotweed planting bases; raw materials sourced from mixed unregulated growing regions; no enzymolysis or multi-stage membrane separation equipment, relying solely on high-temperature ethanol reflux; no dedicated testing for emodin, pesticides or PAHs; no organic certifications.
2. Sourcing Restrictions: Only permitted for low-end domestic aquafeed procurement; strictly prohibited for human edible food, health supplements and cross-border exports.
3. Core Risks: Batch-to-batch fluctuations exceeding emodin and cis-isomer limits; customs seizure overseas for pesticide/heavy metal violations; insufficient end-product efficacy and consumer complaints regarding liver/kidney irritation.
1. Domestic China Sourcing – Premium Organic Enzymolysis Grades: Changsha Huirui, Shaanxi Hongda; Domestic Low-Cost 50%/98% Grades: Xi’an Luman; Oral Liquid Microcapsules: Vidacon. Logistics lead time 3~7 days; on-site verification of organic planting bases and extraction workshops available.
2. Southeast Asian RCEP Markets: Domestic standard food grade shipped FOB Shanghai, eligible for zero tariffs; sea transit 7~15 days delivering 15%~25% lower overall costs; HALAL certification available for halal consumption markets.
3. EU / UK Markets: Organic brands source either Indena original material or Changsha Huirui organic enzymolysis grade; prepare full EU Organic, emodin, PAH and pesticide residue reports in advance, with strict emodin control ≤0.05%.
4. North America (USA / Canada): Self-GRAS documentation mandatory for dietary supplements; USDA NOP planting traceability required for organic products; reject bulk crude powder lacking GACP certification.
5. Middle East & Latin America: Domestic general food grade exported FOB, with KOSHER/HALAL certification; distributed via Southeast Asian transit warehouses with delivery lead time 20~30 days for optimal cost performance.
1. Demand Definition: Confirm export destination country, raw material source (giant knotweed/grape/synthetic), production process (enzymolysis/traditional reflux), purity (50%/98%/99%), formulation (crystal/microcapsule), annual procurement volume and full compliance document checklist (GRAS/organic certificates/emodin/pesticide residue reports).
2. Supplier Preliminary Screening: Verify self-owned giant knotweed GACP planting bases, enzymolysis purification production lines, GMP/organic full certifications and in-house laboratories capable of full HPLC isomer/pesticide residue testing.
3. Sample & Qualification Review: Request 500g sample plus full batch COA (trans-resveratrol content, cis/trans ratio, emodin, moisture, heavy metals, ethanol residues, pesticides & PAHs), bilingual MSDS and organic planting traceability certificates.
4. Third-Party CMA Retesting: Mandatory re-testing of four core identification indicators: trans-resveratrol, trans-isomer proportion, Pb/As heavy metals and moisture; organic grades add pesticide & PAH testing; pharmaceutical grades add endotoxin testing.
5. Small-Batch Trial Production Validation: 5–20kg test batches for granulation, gummy manufacturing or oral liquid formulation; conduct 3-month accelerated aging at 40℃/75RH to confirm no yellowing, sharp cis-isomer elevation or precipitation/cloudiness.
6. Supply Contract Signing: Explicitly stipulate giant knotweed plant origin, enzymolysis process, minimum trans-resveratrol purity, maximum emodin limit, maximum cis-isomer limit, compensation clauses for pesticide residue violations, obligation to deliver full compliance documents and full return/refund for non-conforming material.
7. Routine Warehouse Incoming Sampling: Test appearance, ethanol solution clarity, moisture and HPLC total content per batch; full third-party re-testing every quarter; establish quarterly supplier rating archives.
1. Missing Qualifications: No batch COA or bilingual MSDS; organic products lacking USDA/EU organic planting traceability; EU-bound shipments missing dedicated emodin/PAH testing reports.
2. Non-Conforming Appearance: Yellowed, caked or damp sticky powder; cloudy/layered ethanol solution.
3. Non-Conforming Core Indicators: Trans-resveratrol content or trans-isomer proportion below grade minimum limits; excessive emodin; moisture ＞1%.
4. Non-Conforming Safety Indicators: Heavy metals, ethanol residues, pesticides or microorganisms exceeding regulatory limits.
5. Damaged Packaging: 25kg light-proof fiber drums with double food-grade PE vacuum liners compromised by moisture absorption; no batch number, production date, raw material source or extraction process labeled.
1. Bulk Organic / Pharmaceutical High-Purity Grades: 25kg light-proof fiber drums with double aluminum foil vacuum nitrogen-flushed liners to block UV light, oxygen and moisture.
2. Premium Microcapsule Samples: 1kg/5kg aluminum foil vacuum nitrogen-flushed bags.
3. Mandatory Storage Conditions: Constant temperature 15–22℃, humidity ＜60%, fully light-proof warehouse; prohibited co-storage with metals, oxidants and strong acids; 24-month ambient shelf life; consume within 30 days after opening; refrigeration recommended for long-term storage.
1. Raw Material Adulteration Risk: Synthetic/yeast resveratrol misrepresented as natural giant knotweed extract without plant traceability, incurring massive fines for false natural labeling in Europe and North America; low-cost grape pomace powder blended with giant knotweed extract resulting in insufficient efficacy.
2. Process Substitution Risk: Crude high-temperature reflux material falsely marketed as premium enzymatically refined grade, leading to excessive emodin and ethanol residues with potential liver/kidney irritation hazards.
3. Photodegradation Efficacy Loss Risk: Non-nitrogen-flushed, light-transmitting packaging stored 3–6 months triggers sharp cis-isomer spikes, trans-resveratrol content declines over 10%, causing mass finished product discoloration and reduced efficacy.
4. Cross-Border Compliance Risk: Missing Self-GRAS, EU Organic or dedicated emodin reports lead to customs seizure, product removal and loss of sales channels.
5. Raw Material Supply Volatility Risk: Giant knotweed is seasonally harvested; extreme weather and environmental production restrictions cause supply shortages and price hikes among small manufacturers during peak seasons.
1. Source Quality Control: Embed contractual clauses specifying giant knotweed plant origin, enzymolysis process, emodin limits, cis-isomer limits and financial compensation for violations; request UPLC plant fingerprint chromatograms per batch to distinguish giant knotweed/grape/synthetic raw materials, plus third-party chiral HPLC full isomer chromatograms.
2. Strict Process Segregation: Source only enzymatically refined low-temperature extracted giant knotweed extract for organic cross-border and pharmaceutical applications; completely eliminate high-temperature reflux and acid-alkaline hydrolyzed crude materials.
3. Mandatory Lightproof Nitrogen-Flushed Packaging: Require vacuum nitrogen-flushed aluminum foil liners for all 98%/99% high-purity raw materials; test moisture upon warehouse receipt; prioritize production scheduling for high-moisture batches to avoid long-term storage.
4. Pre-Approval Compliance Verification: Validate full Self-GRAS documentation in advance for US exports; mandate dedicated SGS emodin, PAH and pesticide residue reports for EU shipments; organic raw materials must provide annual planting base water and soil testing records.
5. Dual-Supplier Diversified Inventory: Split procurement between 2 qualified leading suppliers; separate warehousing for organic high-purity and general food grades; maintain 1–1.5 months safety stock; sign annual long-term agreements to lock purchasing prices.
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European & American Organic Health Supplements, Infant Special Diets, Oral Pharmaceutical APIs: Indena original material or enzymatically refined organic high-purity giant knotweed extract from Changsha Huirui / Shaanxi Hongda – natural labeling compliant with zero customs clearance risks for emodin regulations.
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Domestic & Southeast Asian Mass Meal Replacements, Low-Cost Capsules: Xi’an Luman standard food grade for optimal cost performance.
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Aquaculture Feed: Industrial acid-alkaline hydrolyzed crude grade, strictly isolated from human edible food export channels.
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Transparent Oral Liquids & Children’s Gummies: Vidacon water-dispersible microencapsulated giant knotweed resveratrol, cold-water soluble with no sediment.
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Three Indispensable Core Identification Indicators: Trans-resveratrol content (efficacy baseline), emodin (safety red line), cis/trans isomer ratio (activity determination); organic market additionally requires GACP giant knotweed organic planting traceability certificates.
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Customizable Physical Formulations As Needed: Standard 40–80 mesh crystals for hard capsules and tablets; 800-mesh ultrafine water-dispersible microcapsules for clear beverages and children’s gummies; 30% oil suspensions customizable for oil-based softgels.
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Long-Term Supply Chain Lock-In: Sign annual long-term agreements for annual procurement ≥30 tons to lock unit prices and delivery lead times, while accessing anti-aging compound formulation technical support (resveratrol + glutathione + lutein blends).
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Leverage RCEP Trade Policies: All Southeast Asian shipments FOB Shanghai/Ningbo for tariff exemptions delivering 15%–25% lower overall procurement costs.
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Three core evaluation dimensions for giant knotweed extract trans-resveratrol sourcing: extraction process (enzymolysis/traditional reflux/acid-alkaline crude hydrolysis), trans-isomer purity and systematic emodin impurity control. Low-temperature enzymolysis extraction is a mandatory standard for European & American organic and pharmaceutical sectors and cannot be substituted with low-cost high-temperature crude material.
1. Organic cross-border and oral pharmaceutical sectors must adopt enzymatically refined organic high-purity 98%/99% giant knotweed extract with complete USDA/EU Organic, Self-GRAS, emodin and PAH international compliance documentation.
2. Domestic mass dietary supplements and bulk low-cost Southeast Asian meal replacement procurement prioritize standardized ethanol reflux food grade from domestic leading manufacturers, the dominant raw material source globally for cost performance.
3. Strictly segregate acid-alkaline hydrolyzed industrial feed-grade raw materials to prevent diversion into human edible food and export health supplement channels, mitigating triple massive hidden losses: false natural labeling penalties, liver/kidney irritation consumer claims and customs seizure.
4. Global Supply Landscape: China holds 78% of global natural giant knotweed resveratrol production capacity via large-scale self-owned giant knotweed planting in Hunan and Shaanxi plus a complete botanical extraction industrial chain. Domestic enzymatically refined high-purity products continuously meet strict USP and EU Organic standards, gradually displacing high-priced imported European and American raw materials. Sourcing must precisely match extraction process and grade to target market regulatory requirements and brand natural positioning, establishing a fully traceable lightproof nitrogen-flushed plant extract supply chain to drastically reduce risks of photodegradation deterioration and cross-border non-compliance.
If you have inquiries about trans resveratrol sourcing, product selection or other related questions, please contact HiSiaddi customer service or visit our official website: www.hisiaddi.com.
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