Reynoutria japonica Extract

Reynoutria japonica Extract

1. Introduction

Reynoutria japonica Extract (Japanese Knotweed Extract) is a botanical ingredient standardized for trans-resveratrol, a well-studied polyphenol widely used in antioxidant, cardiometabolic, healthy aging, and skin-care formulations. Japanese knotweed root is recognized as a rich natural source of resveratrol.

2. What Is Reynoutria japonica Extract?

• Botanical Source
Derived from Reynoutria japonica Houtt. (Japanese knotweed). 

• Quality & Safety Testing (per COA)
Identification (TLC), heavy metals, pesticide residues, solvent residue, and microbiology are included in the COA testing items. 

3. Key Health Benefits & Mechanisms of Action

1) Antioxidant Support (Cell Protection)

Resveratrol is commonly positioned as an antioxidant ingredient. Health Canada’s resveratrol monograph (with source listed as Reynoutria japonica root) explicitly supports use-claims such as “source of an antioxidant” and “helps protect cells against free radicals.” 

2) Endothelial Function & Vascular Support

Human evidence suggests resveratrol can support endothelial function in certain populations. A randomized trial reported that acute resveratrol supplementation improved flow-mediated dilatation (FMD) in overweight/obese individuals with mildly elevated blood pressure. 

3) Glucose Metabolism & Insulin Sensitivity

Clinical studies indicate potential benefits in glucose control and insulin signaling:

• In type 2 diabetic patients, resveratrol improved insulin sensitivity and reduced oxidative stress in a randomized, placebo-controlled setting. 

• In obese men, 30 days of resveratrol supplementation induced metabolic changes resembling calorie restriction. 

4) Cognitive Aging Support (Memory & Brain Connectivity)

A randomized clinical study in healthy older adults found resveratrol supplementation was associated with improved memory performance, alongside changes in glucose metabolism and hippocampal functional connectivity. 

5) Skin Aging / Photoaging Support (Emerging Clinical Evidence)

Resveratrol is widely discussed for skin applications (anti-oxidative stress, inflammation modulation, photoaging pathways), with human clinical evidence still emerging. A recent double-blind randomized placebo-controlled clinical study evaluated trans-resveratrol for skin health and visible signs of aging. 
A broader clinical-oriented review also summarizes resveratrol’s potential roles in wound healing/scarring/photoaging (noting the need for stronger evidence). 

Evidence note (important for compliant marketing): results across trials are not uniform—some studies/meta-analyses report limited or no effects on certain cardiometabolic endpoints in specific settings. This should be reflected in cautious, structure/function-style claims.

4. Applications of Reynoutria japonica Extract (50% Resveratrol)

• Cosmetics & Personal Care
Used in anti-aging and skin-conditioning concepts (serums, creams, after-sun, tone/texture concepts), with positioning guided by the evidence base and local cosmetic regulations. 

5. How to Choose a High-Quality Reynoutria japonica Extract

• Verified Botanical Part & Traceability
Root-derived extracts are commonly used for resveratrol sourcing; batch traceability and COA transparency matter. 

• Safety & Purity Testing
Ensure routine control of: heavy metals (As/Cd/Pb/Hg), pesticide residues, solvent residue, and microbiological contaminants. 

• Stability Considerations
Resveratrol is light/oxidation sensitive; good packaging and storage guidance are essential (sealed, away from direct sunlight, moisture-controlled). 

6. About Us — Why Choose GreenSky Biological Technology? 

With 21 years of experience in natural plant extracts, Hangzhou GreenSky Biological Technology is a trusted manufacturer supplying global food, supplement, and cosmetic brands. Established in 2004, we operate two professional factories -- a fermentation plant in Hangzhou and an extraction plant in Jiangxi — supported by a 3000+ sqm production base and a 1000 sqm fully equipped R&D center. 

Our Advantages:
• Professional Expertise
Over two decades of focus on botanical extracts, delivering stable and high-grade ingredients such as Milk Thistle Extract and other functional actives. 

• Reliable Quality
Strict HPLC testing, GMP-grade facilities, complete traceability, and multiple international certifications including HALAL, KOSHER, SGS, ISO, ECOCERT, BRCGS, and ISO22000. 

• Flexible Customization
Support for various concentrations, purities, ratios, and particle sizes, including water-soluble forms and OEM/ODM services. 

• Strong Supply Capacity
Annual output of 1000+ tons, ensuring stable and continuous supply from our Jiangxi production base and Hangzhou headquarters. 

• Dedicated R&D Support
A complete laboratory system for quality testing, product development, and technical support. 

7. Conclusion & Call-to-Action

Reynoutria japonica Extract is a premium, evidence-backed botanical ingredient for antioxidant-centered formulations, with additional research supporting potential roles in endothelial function, metabolic parameters, cognition, and skin-aging concepts (depending on target market compliance). 

Contact us now for a FREE SAMPLE and a competitive quotation. Our technical team can help you select the right specification, particle size, and documentation pack (COA + testing items) for your market.

References

1. Wong RHX, et al. Acute resveratrol supplementation improves flow-mediated dilatation in overweight/obese individuals with mildly elevated blood pressure. Nutr Metab Cardiovasc Dis. 2011;21(11):851–856. doi:10.1016/j.numecd.2010.03.003. PMID: 20674311. PubMed

2. Timmers S, et al. Calorie restriction-like effects of 30 days of resveratrol supplementation on energy metabolism and metabolic profile in obese humans. Cell Metab. 2011. PMID: 22055504. PubMed+1

3. Brasnyó P, et al. Resveratrol improves insulin sensitivity, reduces oxidative stress and activates the Akt pathway in type 2 diabetic patients. Br J Nutr. 2011. PMID: 21385509. PubMed

4. Witte AV, et al. Effects of resveratrol on memory performance, hippocampal functional connectivity, and glucose metabolism in healthy older adults. J Neurosci. 2014;34(23):7862–7870. PMID: 24899709. PubMed+1

5. Health Canada. Natural Health Product Monograph: Resveratrol (Reynoutria japonica – root) (English monograph PDF). 2025. 健康加拿大

6. Sahebkar A, et al. Lack of efficacy of resveratrol on C-reactive protein and selected cardiovascular risk factors (meta-analysis conclusion reports no clear benefit on certain CV risk factors). vbn.aau.dk

7. Yoshino J, et al. Resveratrol supplementation does not improve metabolic function in nonobese women with normal glucose tolerance. Cell Metab. 2012. Cell

8. van der Made SM, et al. Trans-resveratrol supplementation and endothelial function (4-week RCT: no FMD effect in overweight/slightly obese adults). Nutrients. 2017;9(6):596. MDPI

9. Rao A, et al. Trans-resveratrol reduces visible signs of skin ageing in healthy adult females over 40: an 8-week randomized placebo-controlled trial. Frontiers in Aging. 2025. Frontiers

10. Hecker A, et al. The impact of resveratrol on skin wound healing, scarring, and photoaging (review). 2021. 

Test report