Japanese Knotweed Root Extract (Resveratrol) Powder – 50% Trans-Resveratrol (Polygonum cuspidatum)

Japanese knotweed root is the main commercial source of natural trans-resveratrol, a stilbene polyphenol. Standardized extracts are valued for healthy aging, cardiovascular and cellular health support.

Supplied as a standardized botanical extract powder with a declared marker-compound assay for batch-to-batch consistency.

GUTINS Japanese Knotweed Extract — 50% trans-resveratrol is offered for manufacturers, formulators and brands. Specification: 50% trans-resveratrol; form / technology: Standardized extract; diet suitability: Plant-based.

Product Specifications

Key Benefits

• Natural source of trans-resveratrol
• Supports healthy aging and cellular longevity pathways
• Supports cardiovascular health
• Provides antioxidant support
• Supports healthy metabolic function

Uses & Applications

Typical applications: Healthy aging.

• Resveratrol capsules
• Healthy aging and NAD+ support stacks
• Heart health formulas
• Antioxidant blends
• Metabolic wellness supplements
• Anti-ageing skincare

How to Use / Dosage

• Typical daily intake: 150-500 mg/day of trans-resveratrol
• Typical use level: 10-60% in capsule fills; 0.1-1% in cosmetics
• Formulation tip: Standardized extracts are best dosed on the basis of the marker assay stated on the CoA.
• Weigh accurately and pre-blend small quantities with a carrier (e.g. maltodextrin, MCC or rice flour) for uniform distribution.
• Final dosage should be based on the lot-specific Certificate of Analysis, the target serving size and the rules of your destination market.

Solubility & Formulation

trans-Resveratrol is very slightly soluble in water; soluble in ethanol; poorly soluble in oils

Storage & Handling

Store tightly closed, protected from light and heat, below 25 °C.. Keep container tightly closed; use clean, dry utensils. Shelf life is typically 24 months in unopened original packaging (see CoA).

Regulatory Note

Resveratrol is sold as a dietary ingredient in the US; in the EU, synthetic trans-resveratrol is an authorised novel food (max 150 mg/day in supplements) and botanical sources should be checked. Verify in the destination market.

Diet suitability: Plant-based. This product is supplied as a raw ingredient for further manufacturing and is not a finished consumer product. The buyer is responsible for ensuring the ingredient, its use level and all label claims comply with the regulations of the destination market (e.g. FDA, EFSA, FSSAI, Health Canada, TGA).

Caution & Disclaimer

• Lower-purity grades contain emodin, which may have laxative effects
• May interact with anticoagulants and CYP-metabolized drugs
• Possible oestrogenic activity - caution with hormone-sensitive conditions
• Not recommended in pregnancy and lactation
• Light-sensitive; trans form can isomerize

For manufacturing, formulation and professional use only. Not for direct consumption in concentrated form. Keep out of reach of children. Avoid inhalation of dust and contact with eyes; use suitable PPE when handling. Consult a qualified healthcare professional before use if pregnant, nursing, taking medication or managing a medical condition. 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.

Bulk & Wholesale Orders

Need more than 5 Kg, a custom specification, private label support or documentation (CoA, TDS, SDS, allergen and GMO statements)? Contact the GUTINS team for bulk pricing and lead times.