Vitis vinifera seed extract standardized to 95% Oligomeric Proanthocyanidins (OPC). Premium antioxidant for nutraceuticals and cosmetics.
Standardized Grape Seed (Vitis vinifera) Extract with OPC (Oligomeric Proanthocyanidins) 95% / 90% specifications. Sourced through qualified production partners for dietary supplement manufacturers.
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Per GSE-001 (Verified 2026-09-20):
| Specification Level | Active Marker |
|---|---|
| Grape Seed Extract OPC 95% (Premium, Polyphenols 95%) | HPLC / UV (Bate-Smith) |
| Grape Seed Extract OPC 90% (Standard, Polyphenols 90%) | HPLC / UV (Bate-Smith) |
| Water-Soluble Grape Seed Extract OPC 50% | HPLC (modified) |
Specifications subject to product requirements and destination-market regulations.
| Botanical source | Vitis vinifera (grape seed) |
| Part used | Seed |
| Active marker | OPC (Oligomeric Proanthocyanidins) and Polyphenols |
| Form | Reddish-brown fine powder |
| CAS No. | 84929-27-1 (Vitis vinifera seed extract) |
| Test Item | Specification | Method |
|---|---|---|
| Appearance | Reddish-brown fine powder | Visual |
| Odor & Taste | Characteristic, slightly astringent | Organoleptic |
| OPC Assay | ≥ 90.0% or ≥ 95.0% | UV (Bate-Smith) / HPLC |
| Loss on Drying | ≤ 5.0% | USP <731> |
| Heavy Metals (Pb/As/Cd/Hg) | ≤ 3/1/1/0.1 ppm | ICP-MS |
| Total Plate Count | ≤ 1,000 CFU/g | USP <2021> |
| Yeast & Mold | ≤ 100 CFU/g | USP <2021> |
| E. coli / Salmonella | Negative | USP <2022> |
All specifications subject to product specification and destination-market requirements.
The 90%/95% difference reflects total Oligomeric Proanthocyanidins content measured via UV (Bate-Smith method) or HPLC. Higher purity is positioned for premium applications.
OPC (Oligomeric Proanthocyanidins) are low-molecular-weight proanthocyanidins (catechin oligomers) considered the bioactive components of grape seed extract. They are strong antioxidants.
Grape Seed Extract is commonly combined with Vitamin C, Vitamin E, and other polyphenol-rich extracts for synergistic effects. We recommend consulting with your formulation team.
Grape Seed Extract is permitted as a food supplement ingredient in the EU. Specific regulatory status depends on intended application and labeling.
OPC content is quantified via UV spectroscopy (Bate-Smith method) and confirmed via HPLC. Production partners can provide detailed methodology.
Standard MOQ is 25 kg. Smaller quantities (5-10 kg) are available for evaluation.
Yes. Custom specifications (e.g., specific OPC content, water-soluble form, packaging) can be discussed with our coordination team.
Standard documentation includes COA, MSDS, allergen statement, Non-GMO statement. Additional documentation available upon request from production partners.
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Data marked as "typical" reflects industry standards; specific values vary by supplier and batch. Documentation including COA, MSDS, allergen, and Non-GMO documentation is available upon request from production partners.
About Nourish Ingredients: We are a China-based sourcing partner for botanical extracts and nutraceutical ingredients. We coordinate supply for international brands — from specification matching to delivery. Production partners maintain FSSC 22000, BRCGS, EU Organic, USDA Organic, FAMI-QS certifications. Documentation available upon request.
For ingredient sourcing inquiries: ashely@nourishingr.com
Reviewed by: Nourish Ingredients Editorial Team Version: 2.3 Last updated: 2026-09-20
| Product Name | Grape Seed Extract (Oligomeric Proanthocyanidins, OPC) |
|---|---|
| Latin Name | Vitis vinifera |
| Main Specs | OPC 90% / 95% |
Industry-standard testing indicators. Values vary by specification grade.
Specification and COA available on request.
Application and formulation guidance available on request.
