HiSiaddi is an innovative foreign trade service provider driven by dual engines of technology commercialization and foreign trade services. It has established a "1+2+3+4=1" service system and can supply grape seed extracts from multiple well-known original manufacturers. As a foreign trader with R&D capabilities, HiSiaddi has repeatedly leveraged its technological cooperation with manufacturers and accurate insight into market demands to resolve customized production requirements for grape seed extracts for clients. Below is a case demonstrating how HiSiaddi addressed customized demands for grape seed extract.
Contact HiSiaddi customer service for more customized service inquiries.
Client: AustriaVital GmbH, Austria A renowned mid-to-high-end natural nutrition and skincare brand in Austria. Its products are sold in premium organic supermarkets, specialist pharmacies and high-end beauty institutions across Austria, Hungary, the Czech Republic and other Central and Eastern European countries. The brand specializes in high-activity antioxidant dietary supplements and oral beauty serums, complying strictly with EU EFSA standards, cGMP, ISO22000 and COSMOS natural certification criteria. Positioned at the high end of the market, it enforces stringent standards for raw material proanthocyanidin content, oligomer monomer ratios, water solubility, taste, stability, pesticide residues and heavy metals, rejecting mass-produced generic raw materials.
The client planned to launch a new generation of high-absorption compound grape seed capsules and water-soluble oral drinks, requiring customized grape seed extract with core specifications: total proanthocyanidins ≥95%, oligomeric proanthocyanidins (OPC) ≥85%, precise catechin monomer ratios, water solubility ≥98%, zero astringency, photolysis resistance and low pesticide residue & heavy metal levels. The initial customized order stood at 400 kg, followed by stable monthly repeat orders of 1.2 tons.
The client previously contacted 4 domestic manufacturers, none of whom could simultaneously meet the strict requirements of high purity, precise monomer ratios, full water solubility, deastringency and long-term stability: some factories only produced generic powder with 90% proanthocyanidins and failed to control monomer proportions; immature water-soluble modification technology caused turbidity in liquid drinks; conventional deastringency processes led to losses of active ingredients. Delays stalled the client’s new product R&D, prompting them to entrust HiSiaddi with end-to-end coordination, including process debugging, lab trials, pilot production, mass manufacturing and compliant delivery.
Conventional industry products typically contain roughly 90% total proanthocyanidins with volatile ratios of oligomers and monomers. The client demanded total proanthocyanidins ≥95% and OPC ≥85%, alongside fixed proportions of various catechin monomers. Traditional extraction and purification technologies struggled to achieve precise ingredient control, failing to restrict batch-to-batch variation within the required 2% threshold.
Ordinary grape seed extract has water solubility below 80%, causing delamination and precipitation when formulated into liquid drinks. Forced water-soluble modification would disrupt proanthocyanidin molecular structures and trigger severe loss of active activity.
Grape seed extract inherently carries strong astringency, which cannot be fully masked by auxiliary materials to meet the "pure flavor" standard for premium oral beverages. Conventional high-temperature deastringency processes accelerate oxidative degradation of active components.
Proanthocyanidins are sensitive to light and oxygen. Standard raw materials suffer sharp activity declines after 3 months of ambient storage, failing to meet the client’s shelf-life requirement of ≥96% active ingredient retention after 12 months at room temperature.
Small-batch customization required independent adjustment of production line parameters, alongside full English test reports recognized by the EU, third-party pesticide residue screening documents and organic traceability files. Most manufacturers lacked comprehensive supporting services and could not deliver within the client’s 40-day deadline.
HiSiaddi set up a special team of technical, quality control and compliance specialists, collaborating with domestic manufacturers specializing in high-end plant extracts. Targeting the client’s downstream application scenarios, we resolved challenges across five dimensions: raw material selection, process upgrading, modification treatment, quality control systems and compliance documentation.
We selected grape seeds imported from Bordeaux, France (the client’s designated raw material source), featuring high polyphenol content and minimal impurities, with bulk fixed-point procurement. All incoming raw materials underwent full pre-inspection to screen for uniform ripeness, zero mildew and compliant pesticide residues. Low-temperature air-drying replaced traditional sun exposure to prevent premature oxidation of active ingredients, minimizing batch-to-batch quality discrepancies from the source.
We adopted a combined low-temperature countercurrent extraction and supercritical CO₂ extraction process, maintaining temperatures below 50°C throughout to maximally preserve proanthocyanidin activity.
Matching gradient separation via macroporous resin and membrane filtration refining technology, we progressively removed ineffective impurities including polysaccharides, crude fiber and pigments. Total proanthocyanidins were stably elevated above 95.5%, OPC locked at approximately 86%, all catechin monomer ratios fully aligned with the client’s formula standards, and batch-to-batch ingredient deviation controlled within 1.5%.
Food-grade polysaccharide coating modification technology was applied without damaging molecular structures, raising raw material water solubility to 98.2%. Aqueous solutions remained transparent with no delamination or precipitation after long-term standing, perfectly compatible with liquid beverage production.
Low-temperature molecular taste masking technology adsorbed astringent substances under ambient conditions with zero high-temperature procedures, completely eliminating strong astringency while avoiding loss of proanthocyanidin activity, delivering a mild, clean flavor in finished products.
Finished powder underwent inert gas nitrogen-filled sealing and surface antioxidant protection to isolate light and oxygen exposure, alongside optimized crystal morphology to boost antioxidant capacity. Accelerated stability testing verified 97.1% retention of active ingredients after 12 months of ambient storage, fully satisfying the long shelf-life demands of premium products.
We coordinated manufacturers to deploy dedicated customized production lines and isolated production zones to avoid cross-contamination, prioritizing this order to shorten production cycles. The entire workflow from process debugging to finished product warehousing took only 36 days, completing delivery 4 days ahead of schedule.
Six quality control checkpoints were implemented: raw material inspection, extraction liquid sampling test, purified liquid detection, post-modification testing, full finished product analysis and pre-shipment re-inspection. Samples from every batch were retained with complete process parameter records to achieve full traceability.
Complying with Central and Eastern European regulatory requirements, we compiled comprehensive English documentation including EP-standard COAs, screening reports covering over 200 pesticide residues, ICP-MS heavy metal test reports, non-GMO declarations, allergen statements, full production traceability ledgers and notarized ISO & GMP certificates. All documents followed formatting standards for local drug administration and customs review, delivered alongside goods.
HiSiaddi shipped 6 kg of trial samples to the client’s laboratory for full-index testing and formula compatibility verification: total proanthocyanidins reached 95.3%, OPC 86.1%, monomer ratios fully compliant; water solubility hit 98.2% with clear solutions free of sediment; complete elimination of astringency; accelerated stability testing showed only 2.2% activity loss after 6 months. All indicators passed inspection, confirming finalized production processes.
The 400 kg customized goods were packed in light-proof aluminum foil vacuum bags inside moisture-proof food-grade cardboard drums before customs declaration and shipment. After arrival at the port, customs clearance proceeded rapidly, and third-party local laboratory re-inspection confirmed all indicators matched trial samples with zero anomalies.
The raw material performed smoothly during mass production of capsules and beverages, with finished product taste, appearance and efficacy stability meeting all brand standards. After launch, the two new products became core store recommendations due to high activity and superior taste, generating outstanding market performance.
The client formally designated HiSiaddi as its exclusive Chinese supplier for customized grape seed extracts, placing fixed monthly orders of 1.2 tons. Subsequently, the client entrusted HiSiaddi with developing two derivative customized products: slow-release microencapsulated grape seed extract and compound polyphenol pre-blends, expanding cooperation to a wider range of premium plant extract raw materials.
For customized grape seed extracts ordered by overseas mid-to-high-end brands, core demands extend far beyond basic content indicators, requiring integrated solutions for precise ingredient control, application compatibility, sensory experience and long-term stability. Generic mass-produced raw materials from ordinary manufacturers lack refined process debugging, specialized modification and comprehensive supporting services.
Backed by premium supply chains, professional plant extract technology and overseas compliance expertise, HiSiaddi delivers end-to-end customized solutions covering raw material sourcing to finished goods, resolving multiple technical barriers and completing high-quality delivery within agreed timelines. For mid-to-high-end clients focused on differentiated positioning and consistent product quality, foreign trade partners integrating technical customization, quality control and compliance services are core pillars supporting new product R&D and market competitiveness.
Contact HiSiaddi customer service for more customized service inquiries.
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info@hisiaddi.com 
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