CAS 501-36-0

Resveratrol

Resveratrol is a naturally occurring stilbenoid polyphenol found in the skins of red grapes, in peanuts, and at high concentration in the roots of Japanese knotweed (Polygonum cuspidatum, also known as Reynoutria japonica). It is a small molecule with the formula C₁₄H₁₂O₃ and a molecular weight of 228.25 g/mol.

The compound exists in two geometric isomers, trans-resveratrol and cis-resveratrol, with the trans form being the biologically active and commercially relevant species. Commercial material is typically standardised as trans-resveratrol at 50 to 99 percent purity.

We source bulk Resveratrol from top China manufacturers for our partners. The manufacturer is in Hebei. For this ingredient the minimum order is 1 kg, and a smaller requirement can ship in a combined container with other ingredients.

Please send the grade you need, the volume and your destination port, and we will come back with a solution and a price.

or call +86-21-6858 0751

Minimum order: 1 kg
Packaging: 25 kg kraft paper bag with PE inner liner

ISO 9001
HACCP
Halal
Kosher

Specifications

Grades / Types Available: Pharmaceutical Grade, Food Grade

Item	Specification
Appearance	White to off-white powder (high purity) or brown powder (extract)
Assay (trans-Resveratrol)	≥ 50% / 80% / 95% / 98% / 99% (HPLC)
Particle Size	95% pass 80 mesh
Moisture	≤ 5.0%
Heavy Metals	≤ 10 ppm
Total Plate Count	≤ 1,000 CFU/g
Purity (Pharmaceutical Grade)	99%
Moisture/Loss on Drying	< 5%
pH	6.0 - 8.0
Lead	< 1 ppm
Arsenic	< 0.5 ppm
Yeast & Mold	< 100 cfu/g

Common Markets Grades

Resveratrol is graded by trans-isomer content and source.

The 50 percent grade is a brown to beige powder derived from Polygonum cuspidatum root extract and is commonly used as a low-cost active in entry-level supplements and cosmetic blends.

The 98 to 99 percent trans-resveratrol grade is the supplement-industry standard, sold as an off-white to light beige crystalline powder with very low residual anthraquinone content. This grade is the basis for most clinical studies and premium formulations.

Pharmaceutical and reference grades at 99.5 percent and above are produced for research use and as analytical standards. They carry full impurity profiling including emodin, physcion, and other anthraquinone markers.

Microencapsulated, liposomal, and cyclodextrin-complexed formats are produced to improve dissolution rate and oxidative stability, since pure trans-resveratrol crystals are light-sensitive and slowly isomerise to the cis form.

Applications

Dietary supplements positioned for cardiovascular wellness, longevity, and antioxidant support
Cosmetic anti-aging serums, eye creams, and brightening formulations
Functional beverages including wellness shots and longevity drink blends
Sports nutrition products targeting recovery and circulatory support
Combination products with NMN, pterostilbene, quercetin, or fisetin in healthy-aging stacks
Topical sunscreens and after-sun products as a complementary antioxidant
Liposomal and nano-emulsion delivery systems for premium supplement lines
Functional confectionery such as wellness gummies and chocolate inclusions
Hair-care formulations targeting scalp health and oxidative damage
Veterinary supplements for senior pets and equine joint formulas
Analytical reference material for polyphenol research
Wine and grape juice analytics where authentic trans-resveratrol is used as a standard

Brands Using Resveratrol

Widely-distributed consumer products that list Resveratrol on the ingredient label.

Brand names, product names and logos are the property of their owners. They appear here as published evidence that the ingredient is used, taken from the brand's own label or website. Their appearance is not an endorsement, and it does not mean the brand buys from us or from any manufacturer listed on this site.

China Manufacturers of Resveratrol

Top Resveratrol manufacturers in China.

VDK NaturaSyn Co., Ltd.
5 ingredients in the directory

Company names and logos are the property of the manufacturers themselves. They are listed here because our own directory records them as producing this ingredient. A listing is not an endorsement by them, and we do not represent them or speak on their behalf.

How We Help Source Resveratrol

Direct Factory Sourcing
We run the whole process: selecting the manufacturer from the top Chinese food ingredient producers, negotiating the price, verifying quality, and coordinating the logistics. You deal with us instead of with several factories at once.
Original Packaging and Documents from the Manufacturer
The manufacturer sends your Resveratrol out of its own factory in the original packing, through to your destination port. The COA, COO, MSDS, TDS and any certifications reach you from the manufacturer as well.
Free Samples and Lead Time
We send 100 to 500 g free for your own laboratory to test and you cover only the courier, usually within 2 to 3 working days. ETD is usually within 7 to 15 days once the order is confirmed, and we check that date against the factory's own manufacturing schedule before we give it to you.
Combined Shipment
We can load Resveratrol together with other ingredients such as Astaxanthin, Dehydrated Garlic and Lutein into one 20' FCL. If your quantity is small, we can also ship LCL.

Regulatory Status

Resveratrol is regulated as a food ingredient or food supplement in most major markets, not as a food colour or additive.

In the European Union, trans-resveratrol from Polygonum cuspidatum root extract is authorised as a Novel Food under Regulation (EU) 2015/2283, with specific conditions of use and maximum daily levels in food supplements for adults.

The U.S. Food and Drug Administration has acknowledged multiple GRAS notifications for resveratrol, including synthetic and fermentation-derived material, for use in defined food and beverage categories. It is also widely marketed as a dietary supplement ingredient under DSHEA.

Health Canada has issued Natural Product Numbers for resveratrol-containing products, with permitted claims focused on antioxidant activity and cellular health support.

Reference monographs for trans-resveratrol have been published by the United States Pharmacopeia. Kosher and Halal certifications are commonly available, and fermentation-derived material is increasingly offered with vegan and non-GMO documentation depending on the production strain.

Manufacturing Process

Resveratrol Manufacturing Process

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Two industrial routes account for nearly all commercial resveratrol supply.

The dominant route is solvent extraction from the rhizomes of Polygonum cuspidatum, an aggressive perennial cultivated and wild-harvested across East Asia. The dried roots contain 1 to 5 percent resveratrol, mostly bound as the glucoside polydatin, which is hydrolysed to free resveratrol during processing.

Roots are washed, milled, and extracted with hot ethanol or aqueous ethanol. The extract is concentrated, treated with enzymes or dilute acid to cleave polydatin, then purified by liquid-liquid partition and recrystallisation to yield 50 percent or 98 percent trans-resveratrol powder. Anthraquinone removal is a critical step.

The fermentation route uses engineered strains of Saccharomyces cerevisiae or Escherichia coli expressing a heterologous pathway from phenylalanine through p-coumaric acid to resveratrol. Several producers operate this route commercially, supplying material marketed as fermentation-derived or biosynthetic resveratrol.

A minor amount of resveratrol is also produced by chemical synthesis from 3,5-dihydroxybenzaldehyde and 4-hydroxybenzaldehyde via a Wittig or Heck-type coupling, primarily for research material and high-purity reference standards.