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Japanese Knotweed Extract Powder

$46.72USD
$46.72USD
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Product Overview

Polygonum cuspidatum (Japanese Knotweed / Giant Knotweed) Extract Powder is a tan, free-flowing powder made from the rhizomes of Japanese knotweed, a prolific Himalayan herb naturally rich in trans-resveratrol and polydatin. Food-grade solvent extraction removes coarse fibre and concentrates active stilbenes to create a neutral-tasting, carrier-free ingredient for antioxidant capsules, healthy-ageing drink sticks, joint-mobility gummies and brightening skin serums.

Grade: Food-grade.

Shelf-life: 18 – 36 months when stored below 77 °F (25 °C) & <60 % RH in an airtight pack.

Form: Extract powder.

Process: Solvent extraction.

Wholesale Giant Knotweed Extract price per kg: Contact us for bulk quotes.

CoA Grade Data
Parameter Specification Result Method
Note: These values represent our universal baseline specifications. Your batch-specific Certificate of Analysis (CoA) is available upon request or provided with shipment.
Physical Properties
Particle Size 60 - 80 Mesh NLT 95% USP <786>
Appearance / Colour Characteristic of source material Conforms Visual
Odour Characteristic of source material Conforms Organoleptic
Moisture / Loss on Drying (LOD) NMT 5% Conforms USP <731>
Bulk Density 0.3 – 0.8 g/mL (typical) Conforms USP <616>
Heavy Metals Profile
Total Heavy Metals NMT 10 ppm Conforms AAS – ICP-MS
Lead (Pb) NMT 3.0 ppm Conforms AAS – ICP-MS
Arsenic (As) NMT 2.0 ppm Conforms AAS – ICP-MS
Cadmium (Cd) NMT 1.0 ppm Conforms AAS – ICP-MS
Mercury (Hg) NMT 0.5 ppm Conforms AAS – ICP-MS
Microbiological Analysis
Total Plate Count NMT 10,000 Cfu/gm Conforms APHA CHP 7, FDA BAM
Yeast & Mold Counts NMT 1,000 Cfu/gm Conforms 7th Ed
E. coli Absent Absent AOAC 991.14
Salmonella Absent Absent AOAC 991.14
Pseudomonas aeruginosa Absent Absent AOAC 991.14
Staphylococcus aureus Absent Absent AOAC 991.14
Extended Testing — Bulk Orders (25 kg+)
Aluminium (Al) NMT 1.0 ppm Available on request ICP-MS
Barium (Ba) NMT 1.0 ppm Available on request ICP-MS
Nickel (Ni) NMT 1.0 ppm Available on request ICP-MS
Nanoparticles (inorganic) Absence of engineered nanoparticles Available on request TEM / DLS
*Note: The values above represent our universal baseline specifications. Please correlate final results with your batch-specific Certificate of Analysis (COA) provided upon shipment.

*Legend: NLT = Not less than | NMT = Not more than | Cfu = Colony forming unit / gram

Shipping & Returns

Priority International Air Shipping (5–8 Days)

  • 250g – 500g: Fixed at $20 – $25
  • 1kg – 2kg: Fixed at $27 – $32
  • Bulk 5kg Tiers: Capped at $49 Max

Domestic Shipping: 3–4 business days; International shipping:5–8 business days.

Return window: 30 days from the date of delivery

Herbuno is not responsible for products restricted or requiring special clearance in your country. Please check with your local customs office to ensure your order can be imported without permits or prescriptions.

Please read our Shipping & Refund policy for full details.
 

Customer Support

Our customer support team is here to help! Reach us at hello@herbuno.com or WhatsApp us at +91-8638692590.

We’re available Monday to Friday, 10am–7pm EST, and Saturday to Sunday, 1pm–6pm EST.

If you contact us outside these hours, we’ll get back to you as soon as we’re online. Your satisfaction is our priority!
 

Product QnA

Q: Why use 50%-resveratrol knotweed extract instead of grape-skin powder?

A: Grape skins contain ~3–5% resveratrol plus sugars; a 50% knotweed extract delivers the same stilbene load in a 500 mg dose without extra calories or fruity flavour, allowing smaller capsules and neutral-taste drink mixes.

Q: What daily amount is typical and safe long term?

A: 500 – 1 000 mg extract (250 – 500 mg trans-resveratrol) is standard for antioxidant and metabolic products. Human studies up to one year show good safety; mild GI bloating is rare and dose-related.

Q: Can knotweed extract pair with quercetin or piperine for absorption?

A: Yes—adding 50 mg quercetin or 5 mg piperine enhances resveratrol bioavailability up to four-fold by slowing glucuronidation. Micro-encapsulation keeps the blend homogeneous in powders.

Q: Is the extract heat-stable for baked nutrition bars?

A: Stilbenes tolerate ≤140 °C for <10 min. Keep bake time short or coat cooled bars with a knotweed-infused drizzle to retain ≥85% potency and bright colour.
 

Nutritional Details

Typical values Per 100g

Energy, 340 kcal
Protein, 5 g
Total fat, 2 g
– of which: Saturated fat, 0.4 g
Carbohydrate, 78 g
– of which: Sugars, <1 g
Dietary fibre, 4 g
Sodium, <50 mg
Trans-resveratrol, ≥50 g
Moisture, ≤2 g
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This product is derived from natural sources, and slight variations in color, aroma, texture, or appearance may occur between batches due to seasonal differences in the raw materials or changes in supplier. These natural variations do not affect the product’s quality or efficacy.

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Antioxidant Capsules: Take 500 mg twice daily for vascular support.

Healthy-Ageing Shake: Blend 1 g with beet-berry powder for daily polyphenols.

Joint-Mobility Gummies: Disperse 0.7 % with vitamin C for flexibility chews.

Pre-Workout Stack: Add 600 mg to nitric-oxide drink sachets for performance pump.

Brightening Serum: Incorporate 1 % in the water phase for skin-tone evenness.

Digestive Tea: Steep 1 g with ginger & lemon for post-meal comfort.

Resveratrol Power: Provides concentrated stilbenes for cellular longevity support.

Cardio Wellness: Helps maintain healthy endothelial function & blood flow.

Joint Comfort: Polyphenols modulate inflammatory enzymes for easy movement.

Blood-Sugar Balance: Emerging data show improved insulin sensitivity markers.

Liver Shield: Antioxidants protect hepatocytes from oxidative wear-and-tear.

Skin-Tone Booster: Inhibits tyrosinase, promoting brighter, even complexion.

Serving Size: 1/2 tsp (≈ 1 g, providing ≥500 mg trans-resveratrol)

Ingredients: 100% Giant Knotweed Extract Powder

Does Not Contain: Added sugar, soy, yeast, gluten, artificial additives

Allergen Information: Free from common allergens

Usage Recommendation: Mix with water, juice or preferred beverage, or take in capsules. Follow healthcare advice.

Storage Advice: Store in a cool, dry place. Keep tightly sealed away from direct sunlight.

Keep Away From Children

Scientific name: Polygonum cuspidatum / Fallopia japonica

Common names: Giant Knotweed; Japanese Knotweed (English) · गियánt क्नॉटवीड (Hindi)

Other regional names: Chinese – 虎杖 (Hǔzhàng); Arabic – عُقدة يابانية; French – Renouée du Japon; German – Japanischer Staudenknöterich; Japanese – イタドリ (Itadori); Spanish – Polígono japonés; Russian – Сахалинская гречиха; Vietnamese – Cốt khiết đông

Country of origin: India

Intended use

Raw bulk ingredient for use by qualified formulators, manufacturers, and researchers. Not a finished dietary supplement or therapeutic product.

Regulatory status

Not evaluated by the FDA, EFSA, or any other regulatory authority. Finished products must comply with all applicable local regulations, labelling requirements, and safety assessments prior to sale.

Medical advice

Information on this page is for technical reference only. It does not constitute medical advice and is not intended to diagnose, treat, cure, or prevent any disease or health condition.

Buyer responsibility

Inclusion levels, claims, and applications vary by formulation context and target market. The buyer is solely responsible for regulatory compliance of any finished formulation.

Safe handling

Follow applicable local regulations for food, cosmetic, or supplement applications. Consult a qualified regulatory advisor where required. Keep away from children. Store as directed on the CoA.

Herbuno.com is operated by Gausyn Global LLP (India). We do not provide medical advice or prescriptions. Please consult a qualified healthcare professional before use.

How to store?

Keep it in a cool and dry place away from moisture and sunlight. Store the contents in an airtight Container after opening the package.

Where do we ship?

DOMESTIC (India):

We deliver across all postal codes in India.

INTERNATIONAL (Export) :

We export and ship to almost all countries in the world.

Popular markets are United States, United Kingdom (UK), Canada, China, Australia, France, Germany, Italy, Netherland, Switzerland, Belgium, Austria, Finland, Sweden, Norway, Poland, Denmark, Lithuania, Serbia, Slovakia, Croatia, Greece, Kuwait, Israel, UAE, Singapore, Indonesia, Malaysia, Thailand, Vietnam, South Korea, Japan, Canada, Nepal, Bangladesh, Sri Lanka

Is delivery free?

International Shipping is charged based on destination and total weight. You will be shown the shipping cost at checkout.

What payment methods do you accept?

We accept all major credit/debit cards, UPI, net banking, PayPal and international cards. Cash on Delivery (COD) is currently not available.

Do you offer private label options?

Yes, we do! We work with select partners on private label and bulk supply arrangements. If you're looking to sell our products under your own brand or source in bulk, email us at hello@herbuno.com with your requirements.