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Hu Zhang Liquid Extract, Root

Hu Zhang Alcohol-FREE Liquid Extract, Hu Zhang (Polygonum Cuspidatum) Dried Root Glycerite
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Common Name : Hu Zhang

Botanic Name : Polygonum Cuspidatum

State / Part : Dry / Root

Form : Hu Zhang Liquid Drops / Extract

Process : Gentle Low-Heat Extraction
UPC : 840253628176
MPN : HZPCR
SKU : hu-zhang-nonalc-extract
Application : For internal use
Availability : In Stock
- Please Select -
2 Oz $22.95
4 Oz $38.95
2x2 Oz $39.95
2x4 Oz $69.95
4x4 Oz $119.95
32 Oz $189.95
64 Oz $279.95
2x32 Oz $289.95
20x4 Oz $449.95
2 Gal $799.95
$22.95
Looking for full strength? Try our Hu Zhang Root Tincture Hu Zhang (Polygonum cuspidatum) Every extract and blend we make from this plant

Hu Zhang (Polygonum cuspidatum) root — alcohol-free liquid extract (glycerite). Made in Hawaii, USA with domestic & imported ingredients.

Alcohol-free Vegetable glycerin and purified water
Ethically sourced Wild-harvested or cultivated Polygonum cuspidatum root
Clean formula Formulated without alcohol, gluten, fragrances, or any artificial and natural colors
Classic extraction Herb-specific standards, small batches
Made in Hawaii, USA With domestic & imported ingredients, FDA-registered facility
Easy to dose 20–30 drops, up to 4 times a day
PRODUCT DETAILS
IngredientsWild Harvested Hu Zhang (Polygonum Cuspidatum) Dried Root.
Other ingredientsVegetable glycerin, purified water.
Formulated withoutAlcohol, gluten, fragrances, or any artificial and natural colors.
Suggested useShake well. 20–30 drops (about 0.7–1 ml, one full squeeze of the dropper) in 2 oz of water, tea or juice, up to 4 times a day or as directed by your practitioner. Glycerites may also be taken directly.
StorageDo not use if the seal is broken or missing. Store in a cool, dry place.
SafetyKeep out of reach of children. If you are pregnant, nursing or taking medication, consult your doctor before use. Discontinue use if any adverse reaction occurs.
Large sizes32 oz jars may contain some plant material. No returns on 15x4 oz, 32 oz, 2x32 oz, 64 oz and 2 gal options.
Hu Zhang (Polygonum Cuspidatum) also known as
Name Language Note
Ku-kang Chinese (Pinyin) Older pinyin/Wade-Giles transliteration variant.
Japanese Knotweed Supplement Commercial Name Commonly used commercial name in English-speaking countries
Hu Zhang Extract Commercial Name Commonly used commercial name in English-speaking countries
Japanese Knotweed English Most widely used common name.
Sally Rhubarb English A regional folk name used in the United Kingdom.
Asian Knotweed English Alternative common name.
Japanese Fleeceflower English Distinguishes it from other species in the genus.
Renouée du Japon French Standard French common name.
Japanischer Staudenknöterich German Standard German common name.
Poligono del Giappone Italian Standard Italian common name.
Itadori Japanese Translates to 'remove pain' or 'well-being'.
Fallopia japonica Latin Synonym Currently accepted scientific botanical name.
Reynoutria japonica Latin Synonym Frequently used botanical synonym.
Polígono-do-japão Portuguese Used in both Portugal and Brazil.
Gorets yaponskiy Russian Transliterated from Горец японский.
Reynoutria Spanish Commonly used in botanical and herbal contexts in Spain.
Hu Zhang Gen TCM The suffix 'Gen' specifically refers to the root part.
Japon madımağı Turkish Common name used in Turkey.
Cốt khí củ Vietnamese Commonly used name for the medicinal root.
Frequently Asked Questions about Hu Zhang Extract
What is Hu Zhang (Japanese Knotweed) and its botanical name?
Hu Zhang is the traditional Chinese name for the root of a hardy perennial plant in the buckwheat family (Polygonaceae), known in English as Japanese knotweed. For many years the plant was classified botanically as Polygonum cuspidatum, and that name is still the most common on labels. Under modern classification, however, the accepted name is Reynoutria japonica, and the widely used synonym Fallopia japonica appears in many references - all three refer to the same plant. Other common names include Mexican bamboo and, in Japanese, itadori. Our extract is made from the dried root of the plant. Note that this is a different species from He Shou Wu (Reynoutria multiflora); the two share a plant family but are not the same herb. Each batch is prepared from ethically sourced, wild-harvested raw material as a concentrated liquid, and offered in two forms - an alcohol-free glycerite and a traditional alcohol-based tincture. This is a whole-root liquid extract carrying the plant's natural spectrum of constituents, not an isolated or standardized single-compound product.
What is the difference between the alcohol-free and tincture versions?
Both are liquid extracts of the same wild-harvested Hu Zhang (Polygonum cuspidatum) root; only the solvent differs. The alcohol-free version is a glycerite made with roughly 60% vegetable glycerin and 40% purified water, giving it a naturally mild, sweet taste that suits those who avoid alcohol. The tincture uses a traditional blend of alcohol, vegetable glycerin and water, the classic conventional extraction method that yields a super-concentrated extract. Choose the glycerite if you prefer no alcohol; choose the tincture for a traditional alcohol-extracted format with a longer shelf life.
Is this the same as resveratrol, and why does the label say Polygonum cuspidatum?
No - this is an important distinction. Japanese knotweed root is one of the plant world's best-known natural sources of resveratrol, a compound also found in grapes, but resveratrol supplements are an isolated, purified single compound. Our product is different: it is a whole-root liquid extract that preserves the plant's own natural spectrum of constituents rather than concentrating any single isolated molecule. If you are specifically looking for a purified resveratrol isolate, that is a different type of product. On the botanical name: our label uses Polygonum cuspidatum because it remains the most widely recognized name, but the plant has been reclassified, and its currently accepted name is Reynoutria japonica (with Fallopia japonica as a common synonym). It also helps to know that Japanese knotweed is famous as an aggressive invasive plant in many regions; our product is a cultivated or wild-harvested herbal extract, labeled clearly by botanical name and plant part so there is no confusion.
How do I use Hu Zhang liquid extract?
Shake well before use. Use the number of drops and the frequency shown on the label, in a little water, tea or juice, or as directed by your practitioner. Drink the entire contents.
Is Hu Zhang extract right for everyone? Safety and storage.
Hu Zhang is not appropriate for everyone. The root naturally contains anthraquinones such as emodin, which in larger amounts can have a laxative effect, so it is best used at the suggested serving. If you are pregnant or nursing, take any medication - including blood-thinning medication - or have a medical condition, talk with a qualified healthcare practitioner before use. Keep out of reach of children, and do not exceed the suggested serving. Store as directed on the label. These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
Where is this product made?
Made in the USA by Hawaii Pharm LLC, Honolulu, HI, with domestic & imported ingredients.
What is your return policy?
We offer a 30-day return policy. Returns are free and accepted by mail.
How long does shipping take?
U.S. delivery takes 1 to 5 business days by USPS Priority Mail, UPS or FedEx; USPS Ground Advantage can take 10+ days.
⚠️ 64 fl.oz plastic containers can leak a little during transportation - this is not subject to refund or replacement!

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ETHICALLY SOURCED, NATURAL INGREDIENTS
Our Hu Zhang (Polygonum Cuspidatum) Root is selected from regions with optimal growing conditions to support a high concentration of active constituents. We work only with trusted suppliers and focus on sourcing clean, well-preserved botanical material suitable for high-quality liquid extraction.
To verify botanical identity and ensure consistency, all raw materials are tested in our laboratory using established analytical techniques. These include High-Performance Thin-Layer Chromatography (HPTLC) for plant authentication and fingerprinting, or Fourier-Transform Infrared Spectroscopy (FTIR) and other in-house methods. Our approach is guided by relevant standards such as those of the USP and Ph. Eur. and cGLP, allowing us to maintain rigorous quality control, ensuring the material meets our specifications for identity, purity and composition.
METICULOUS EXTRACT PREPARATION

Drawing on decades of botanical expertise, Hawaii Pharm determines the optimal herb-to-menstruum ratio for each specific botanical. This proprietary approach acknowledges that every plant species possesses unique technical characteristics and varying concentrations of natural compounds across harvests.

For Hu Zhang (Polygonum Cuspidatum) Dry Root Glycerite, we've perfected a precise extraction process that honors the distinctive profile of the raw material. Our master herbalists analyze each incoming batch and adjust extraction parameters accordingly, ensuring consistent quality despite natural variations in botanical sources. This customized approach reflects our company's accumulated knowledge and dedication to excellence over many years in the industry.

Extraction is performed at the lowest possible temperatures to preserve the maximum amount of bioactive compounds.

The extract is prepared with our signature blend of 40% purified water and 60% vegetable glycerin, creating a stable, alcohol-free liquid extract that preserves the botanical's natural integrity.

No sugar is added to this product. Its mildly sweet taste comes from vegetable glycerin.

COMPREHENSIVE LABORATORY TESTING
Each batch may undergo one or more of the following tests, depending on the product type and regulatory requirements:
  • Organoleptic evaluation (color, consistency, aroma)
  • FTIR and/or HPTLC spectral analysis for identity confirmation
  • Microbiological testing (total plate count, E. coli, coliforms)
  • Yeast and mold screening
  • Viscosity measurement
  • Refractometric analysis
SUPPLEMENT FACT SHEETS
Supplement Facts
Serving Size: 1 ml
Servings Per Container: 60
Amount Per Serving
% DV
Hu Zhang (Polygonum Cuspidatum) Dry Root extract 1156 mg R
†
† Daily Value (DV) Not Established.
CERTIFICATE OF ANALYSIS

COAs are available upon request for customers with Wholesaler or Practitioner accounts.

To request a COA, please provide your order number and the batch number from the product label.

This policy helps us ensure traceability and maintain high standards of documentation for professional and bulk-use customers.

Each batch is manufactured with care. Best if used within 3 years of the manufacturing date when stored in a cool, dark place.

LABEL VERSION ver 3.1.2025
label of Hu Zhang (<i>Polygonum Cuspidatum</i>) Dry Root Glycerite
FDA Registered Facility

All Hawaii Pharm products are manufactured in our FDA registered facility in Hawaii, USA, with domestic & imported ingredients, following strict Good Manufacturing Practices (GMP). Our dedication to quality control ensures consistency and purity in every bottle.

Our Quality Guarantee

We stand behind the quality of our Hu Zhang (Polygonum Cuspidatum) Dry Root Glycerite with our satisfaction guarantee. Each bottle contains the pure essence of natural botanical ingredients, expertly extracted without alcohol, preservatives, or synthetic additives.

Storage Recommendations

To maintain optimal potency, store your Hu Zhang (Polygonum Cuspidatum) Dry Root Glycerite in a cool, dark, and dry place. When properly stored, this product maintains its quality for up to 4 years from the manufacturing date.

At Hawaii Pharm, quality is our foundation.
Every bottle of our Hu Zhang (Polygonum Cuspidatum) Root undergoes rigorous testing and quality control to ensure you receive only the finest botanical extract.

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I have not taken it long enough to evaluate it fully. However, I really like that it does not have alcohol. The taste is acceptable.

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awesome thank you

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Just as described

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have not tried it yet so no idea how it is. Just wanted a replacement for when I do need it.

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* These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure, or prevent any disease.
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