Product Name: Polygonum Cuspidatum Extract
Active Ingredient: Resveratrol
Specification: 50%, 98% Resveratrol
Appearance: Fine brown to white powder
Extraction Part: Root
Test Method: HPLC
Certificate: ISO22000, Kosher, Halal, Organic(EU), USDA, FSSC 22000, FDA,SGS
Sample: 5-50g Sample For free
MOQ: 1kg
OEM Service: Private Label and Custom Package
In the world of high-performance nutraceuticals, Polygonum Cuspidatum Extract (Resveratrol Powder)—frequently labeled as Japanese Knotweed Extract or Hu Zhang—has evolved from a basic antioxidant to the cornerstone of the longevity industry. While many recognize it as a “grape seed alternative,” industry experts know that Polygonum Cuspidatum is the most commercially viable and potent source of Natural Trans-Resveratrol available today.
The efficacy of your final product depends entirely on the isomer profile. We focus exclusively on the Trans-Resveratrol form. Unlike the unstable cis isomer, our extract remains biologically active at the cellular level, targeting the SIRT1 longevity pathways and providing the heavy-lifting antioxidant support your customers demand. By refining the raw Giant Knotweed rhizome, we deliver a polyphenol profile that supports cardiovascular health and skin-aging defenses with clinical-grade precision.
The current market is saturated with low-grade powders that often carry a heavy “chemical” odor or dark discoloration. Today’s consumers are more educated; they are looking for clean-label, non-GMO, and low-emodin profiles. As the global demand for NMN and anti-aging stacks grows, Resveratrol has become the “essential partner” ingredient, creating a massive opportunity for brands to offer high-purity, synergistic formulations.
1. Consistent High‑Purity Across Every Batch
Our resveratrol powder is standardized to ≥98% trans‑resveratrol, the biologically active isomer proven to deliver antioxidant, anti‑inflammatory, and age‑management effects. While many suppliers’ extracts vary between 50% and 98% resveratrol content, our tight quality control ensures true ≥98% purity batch after batch, verified by HPLC analysis. This level of consistency is not just a spec — it directly improves product performance in finished formulations, from dietary supplements to premium skincare actives.
2. Rigorous Contaminant Control and Safety Metrics
We don’t just hit high potency — we control contaminants better than typical industry standards. Our internal QC verifies:
These controls reduce risk for regulatory review and accelerate product approval timelines in global markets — a critical advantage when expanding into North America, Europe, or regulated cosmetic sectors.
3. Nearly 20 Years of Extraction and Customization Expertise
With 20 years of dedicated botanical extraction and OEM experience, our R&D and manufacturing teams have mastered the nuances of extracting and stabilizing resveratrol from Polygonum Cuspidatum roots. This deep experience translates into:
4. True OEM Partnership, Not Just Raw Material Supply
Your brand gets an ingredient that’s not just high quality, but also engineered for manufacturability and regulatory alignment — a major differentiator in crowded nutraceutical and cosmetic marketplaces.
| Test Item | Specification | Result |
| Appearance | Fine light yellow to light brown powder | Light yellow powder |
| Odor & Taste | Characteristic | Characteristic |
| Resveratrol Content (HPLC) | ≥98% trans‑resveratrol | 98.30% |
| Loss on Drying (105°C, 2h) | ≤5.0% | 3.20% |
| Ash Content | ≤5.0% | 2.80% |
| Heavy Metals | Compliant with USP / EU | Compliant |
| Lead (Pb) | ≤2.0 mg/kg | 0.4 mg/kg |
| Arsenic (As) | ≤1.0 mg/kg | 0.2 mg/kg |
| Cadmium (Cd) | ≤1.0 mg/kg | 0.1 mg/kg |
| Mercury (Hg) | ≤0.1 mg/kg | ND (Not Detected) |
| Total Plate Count | ≤1000 CFU/g | 120 CFU/g |
| Yeast & Mold | ≤100 CFU/g | 25 CFU/g |
| E. coli | Negative | Negative |
| Salmonella | Negative | Negative |
| Staphylococcus aureus | Negative | Negative |
| Particle Size | 80 mesh | 95% pass 80 mesh |
| Solubility | Soluble in ethanol, DMSO; slightly soluble in water | Pass |
| Residual Solvents (Ethanol) | ≤5000 ppm | 450 ppm |
| Pesticide Residue | Compliant with EU/USP standards | Compliant |
1. Cardiovascular Support
Resveratrol is often linked to heart health. It may help keep blood vessels flexible, support healthy cholesterol levels, and reduce the chance of blood clots. By improving circulation, it also helps maintain overall cardiovascular function.
2. Healthy Aging
Thanks to its antioxidant power, resveratrol helps fight the damage caused by free radicals. This can slow down some of the effects of aging and support long-term wellness.
3. Cellular Balance
Resveratrol is known for supporting the body’s natural defense systems. By helping cells work more efficiently, it promotes balance in the body and contributes to better overall health.
4. Skin Health and Protection
Resveratrol can help protect the skin from daily stressors such as UV rays and pollution. It also supports skin vitality, helping maintain a more youthful and healthy appearance.
1. Cosmetics and Personal Care
Resveratrol is becoming a favorite ingredient in skincare because of its natural anti-aging and protective effects. It helps fight wrinkles, calms skin irritation, and shields the skin from UV rays and pollution. You’ll often find it in serums, creams, sunscreens, and lotions where it works to keep skin looking smooth, healthy, and youthful.
2. Dietary Supplements
In the supplement world, resveratrol is best known for its role in supporting heart health, immune balance, and liver detox. It’s a powerful antioxidant, so it helps the body fight oxidative stress and maintain overall wellness. That’s why it’s often made into capsules, tablets, and softgels, either on its own or combined with other nutrients in anti-aging and vitality blends.
3. Functional Foods and Beverages
Resveratrol is also added to functional foods and drinks to give them an extra health boost. It supports joint health, brain function, and daily energy, all while protecting cells from stress. You might see it in energy drinks, nutrition shakes, fortified snacks, or wellness beverages, making it easy to get the benefits as part of everyday nutrition.
There are no established recommended daily doses for resveratrol. Your dosage and how long you should take it depend on your health conditions and diet.
Oral resveratrol dosing has included 250-1,000 milligrams taken daily for up to three months. Doses of 500 milligrams once a day for at least three months have been shown to have the greatest impact on body weight and BMI. More studies are needed to determine optimal resveratrol dosing recommendations.
Q: What is the difference between Polygonum Cuspidatum Extract and pure Resveratrol powder?
A: Polygonum Cuspidatum Extract is the natural source of resveratrol, often standardized to ≥98% trans-resveratrol, while “pure” resveratrol may be synthetic. Natural extract provides additional polyphenols and bioactive compounds.
Q: How stable is Resveratrol Powder?
A: Stability can be affected by light, heat, and oxygen. Store in cool, dry, dark conditions and use microencapsulation or protective packaging for extended shelf life.
Q: Is it water-soluble?
A: Resveratrol is slightly soluble in water and soluble in ethanol, DMSO. For aqueous products, consider nanoemulsions, liposomal delivery, or solubility enhancers.
Q: Can it be combined with other antioxidants?
A: Yes, it’s often combined with vitamin C, CoQ10, green tea extract, or polyphenols for synergistic antioxidant effects.
Q: How can I ensure product quality and purity?
A: Look for ≥98% trans-resveratrol content, COA verification, low heavy metals, and microbial safety. Our products provide full COA with each batch, ensuring reliability for business manufacturing.
Q: Can it be used in OEM formulations?
A: Absolutely. Our extract can be customized for potency, particle size, and form, making it suitable for capsules, tablets, powders, functional drinks, or skincare products.
Launching a standout supplement requires more than just raw ingredients; it requires the right physical specifications. We differentiate ourselves by offering customized Resveratrol powder—from high-flow granules for fast-run manufacturing to micronized isolates for cosmetic applications. Our production is fully certified, ensuring your brand stays compliant in any global market. We take the guesswork out of Polygonum Cuspidatum sourcing by providing stable, high-potency material that integrates perfectly into your existing formulas. To explore our custom blending or bulk procurement options, email us at info@botancialsupplier.com.
Just send email to info@botanicalsuppliers.com, or submit your requirement in bottom form, we are of service at any time!
If you have any questions, please contact our experts.We are always ready to help you with individual formulations, private label solutions or any other requirements to kick-start your brand!