Giant Knotweed Extract

Polygonum cuspidatum

Huisong Pharmaceuticals offers premium Giant Knotweed Extract, carefully sourced from high-quality giant knotweed root raw materials grown in China and harvested in September to November or March to April. The extract is standardized to 20-98% Resveratrol HPLC, and we can also offer ratio extracts, straight powders and fine cuts to meet precise formulation requirements. Our giant knotweed products are ideal ingredients for pharmaceuticals, dietary supplements, personal care and animal feed formulations.

Potential Health Benefits

Giant knotweed is widely recognized for its naturally occurring bioactive compounds such as resveratrol, polydatin, and emodin. Modern research suggests it possesses potent antioxidant properties, which may support cardiovascular health.*^[1-4] Its compounds are also studied for potentially supporting cognitive function.*^[5-7] Furthermore, extracts may support liver health.*^[8-9]
Applications and Versatility

Our giant knotweed products are highly versatile, available in various extracts, powders, fine cuts, and NOP & EU Organic options, enabling seamless integration into a wide range of product formats. Rich in naturally occurring bioactive compounds such as resveratrol, they are well suited for use in capsules, tablets, powders, and liquids. With mild botanical notes and excellent formulation compatibility, giant knotweed extract can be easily combined with complementary functional ingredients to support cardiovascular, cognitive, and overall wellness positioning.
Unmatched Quality and Compliance

Quality assurance is at the heart of everything we do at Huisong. Our Giant Knotweed Extract undergoes thorough botanical identification and testing for key bioactive compounds, pesticide residues, heavy metals, microbial contaminants, aflatoxins, and more. Operating from over 185,000 m² of advanced, state-of-the-art facilities, we employ sophisticated water and ethanol-based extraction methods that maximize bioactive compound retention and purity.

Potential Health Benefits

Giant knotweed is widely recognized for its naturally occurring bioactive compounds such as resveratrol, polydatin, and emodin. Modern research suggests it possesses potent antioxidant properties, which may support cardiovascular health.*^[1-4] Its compounds are also studied for potentially supporting cognitive function.*^[5-7] Furthermore, extracts may support liver health.*^[8-9]

Applications and Versatility

Our giant knotweed products are highly versatile, available in various extracts, powders, fine cuts, and NOP & EU Organic options, enabling seamless integration into a wide range of product formats. Rich in naturally occurring bioactive compounds such as resveratrol, they are well suited for use in capsules, tablets, powders, and liquids. With mild botanical notes and excellent formulation compatibility, giant knotweed extract can be easily combined with complementary functional ingredients to support cardiovascular, cognitive, and overall wellness positioning.

Unmatched Quality and Compliance

Quality assurance is at the heart of everything we do at Huisong. Our Giant Knotweed Extract undergoes thorough botanical identification and testing for key bioactive compounds, pesticide residues, heavy metals, microbial contaminants, aflatoxins, and more. Operating from over 185,000 m² of advanced, state-of-the-art facilities, we employ sophisticated water and ethanol-based extraction methods that maximize bioactive compound retention and purity.

Chromatogram

PRODUCT SPECIFICATION(S)

20-98% Resveratrol HPLC

Ratio Extracts

Straight Powder

Fine Cut

FREQUENTLY ASKED QUESTIONS (FAQS)

Q1:How might Giant Knotweed Extract specifically support cardiovascular health?
Q2:What other botanical ingredients may Giant Knotweed Extract be combined with?
Q3:Which consumer groups may benefit most from Giant Knotweed Extract supplementation?

Giant knotweed extract contains naturally occurring resveratrol, which may help support healthy cardiovascular function.*

Giant Knotweed Extract may be combined with Grape Seed Extract, Acai Fruit Extract, Green Tea Extract, Pomegranate Extract and /or Hawthorn Berry Extract to support antioxidant activity and cardiovascular health.*

Giant Knotweed Extract may be especially suitable for individuals seeking to support cardiovascular wellness.*

WHY PARTNER WITH HUISONG PHARMACEUTICALS ?

We care about what is being put into the people’s own system. This is proven through proper identification, potency and quality testing every step of our process. Since our founding in 1998, Huisong Pharmaceuticals established itself as a trusted leader in botanical extraction, processing and innovation, proudly serving public and private nutraceutical, pharmaceutical, food and beverage, personal care, and animal and pet brands worldwide. Our meticulous manufacturing processes, transparent global supply chains, experienced customer service teams and rigorous sourcing and quality standards reflect our enduring dedication to our core values of Nature, Health, and Science first.

* 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.

References

1. Food Sci Nutr. 2025, 13 (1): e4750. doi: 10.1002/fsn3.4750.
2. Front Pharmacol. 2022, 13: 863707. doi: 10.3389/fphar.2022.863707.
3. Int J Mol Sci. 2021, 22 (18): 10152. doi: 10.3390/ijms221810152.
4. Complement Ther Med. 2022, 70: 102863. doi: 10.1016/j.ctim.2022.102863.
5. Mol Neurobiol. 2025, 63 (1): 311. doi: 10.1007/s12035-025-05470-8.

6. Phytomedicine. 2012, 19 (8-9): 677-81. doi: 10.1016/j.phymed.2012.03.002.
7. Molecules. 2021, 26 (19): 5985. doi: 10.3390/molecules26195985.
8. Fitoterapia. 2025, 187: 106938. doi: 10.1016/j.fitote.2025.106938.
9. J Funct Foods. 2019, 55: 175-83. doi.org/10.1016/j.jff.2019.02.029.