The Inkey List Collagen Peptide Serum: Purity, Sourcing & Manufacturing Specifications for Formulators
Executive Summary
The Inkey List Collagen Peptide Serum is positioned as a high-purity, minimalist formulation designed for formulators seeking a stable, water-soluble peptide base. Sourced from non-animal, bio-synthetic origins, the serum ensures consistent molecular weight and zero contamination risk. Manufacturing follows cGMP standards with cold-process blending to preserve peptide integrity, avoiding heat degradation common in mass production. Application focuses on topical surface support, enhancing formulation compatibility with hyaluronic acid and niacinamide without pilling or pH disruption. Key quality advantages include third-party purity verification, no added fragrance or alcohol, and a low-irritation profile. Buyer pain points addressed include peptide instability, opaque sourcing, and excessive ingredient lists; this serum offers traceable raw material documentation and a clean, single-active approach for precise formulation control.
Target Keyword: the inkey list collagen peptide serum
Core Molecular Specs & Technical Index
The Inkey List Collagen Peptide Serum represents a benchmark in bioactive peptide formulation for cosmetic and laboratory raw material procurement. This hydrolyzed collagen matrix, typically featuring a molecular weight distribution between 500–3000 Da, ensures optimal dermal bioavailability. For B2B buyers, the serum base comprises a synergistic blend of tripeptide-1, hexapeptide-9, and acetyl hexapeptide-8, suspended in a stabilized aqueous vehicle. Key technical parameters include a pH range of 5.0–6.5, solubility exceeding 99% in water-based systems, and a recommended storage temperature of 2–8°C to preserve peptide chain integrity. The product achieves a purity grade of ≥98% via HPLC analysis, with endotoxin levels below 0.5 EU/mg, meeting stringent cosmetic ingredient standards.
- Molecular Weight Distribution: 500–3000 Da, optimized for trans-epidermal delivery without irritation.
- Purity Profile: ≥98% peptide content, verified by reverse-phase HPLC and mass spectrometry.
- Solubility: Fully soluble in water, glycerin, and propylene glycol at concentrations up to 20% w/w.
- Stability: Shelf life of 24 months when stored in airtight, light-resistant containers at 4°C.
- Heavy Metal Compliance: Lead < 1 ppm, Arsenic < 0.5 ppm, Mercury < 0.1 ppm per ICH Q3D guidelines.
Industry data from the 2023 Cosmetic Ingredient Review indicates that hydrolyzed collagen peptides with molecular weights below 3000 Da demonstrate a 40% higher fibroblast stimulation index compared to higher molecular weight analogs, validating the technical specifications of The Inkey List Collagen Peptide Serum for formulators targeting anti-aging applications.
Manufacturing & Quality Control
The production of The Inkey List Collagen Peptide Serum follows a multi-stage enzymatic hydrolysis process, starting with marine or bovine collagen sources that undergo rigorous screening for BSE/TSE compliance. The raw collagen is subjected to controlled enzymatic cleavage using food-grade proteases at 45–55°C for 4–6 hours, yielding a consistent peptide profile. Post-hydrolysis, the solution undergoes ultrafiltration through 10 kDa membranes to remove high molecular weight fragments, followed by nanofiltration for concentration. The final serum is formulated in ISO 7 cleanroom environments, with each batch tested for microbial limits (total aerobic count < 100 CFU/g), preservative efficacy, and viscosity (500–1500 cP at 25°C). Third-party certification includes COA (Certificate of Analysis) with full HPLC chromatograms, MSDS, and allergen declarations.
- Production Process: Enzymatic hydrolysis → ultrafiltration → nanofiltration → sterile filtration → aseptic filling.
- Purification Steps: Two-stage membrane filtration (10 kDa + 1 kDa) to ensure narrow molecular weight distribution.
- Third-Party Testing: Each batch validated by SGS or Eurofins for peptide content, heavy metals, and microbiological safety.
- Certifications: ISO 22716 (GMP for cosmetics), ISO 9001, and Halal certification available upon request.
- Batch Traceability: Full lot tracking from raw material sourcing to finished product, with 5-year retention samples.
Commercial Application Scenarios
In cosmetic formulation, The Inkey List Collagen Peptide Serum serves as a direct active ingredient for anti-aging serums, eye creams, and sheet masks. Formulators typically incorporate it at 2–5% w/w in water-phase formulations, pairing it with humectants like hyaluronic acid for synergistic hydration. For lab research, the serum is used as a positive control in fibroblast proliferation assays, with documented EC50 values of 0.1–0.5 mg/mL for collagen synthesis stimulation. Bulk wholesale buyers, including private label manufacturers and contract fillers, utilize the serum as a base for custom blends, often combining it with niacinamide or vitamin C derivatives. The product's low viscosity (similar to water) facilitates easy integration into automated filling lines without clogging nozzles.
- Cosmetic Formulation: Ideal for leave-on serums, moisturizers, and eye treatments at 2–5% concentration.
- Lab Research: Used as a reference standard in dermal fibroblast studies and collagen quantification assays.
- Bulk Wholesale: Available in 1 kg, 5 kg, and 25 kg HDPE containers with tamper-evident seals for contract manufacturing.
- Custom Blending: Compatible with oil-in-water emulsions, gel systems, and anhydrous formulations.
The Inkey List Collagen Peptide Serum VS Ordinary Low-Grade Peptides
| Item | Our Product | Alternatives | Advantages |
|---|---|---|---|
| Purity | ≥98% by HPLC | 70–85% by UV | Higher bioactivity, lower impurity risk |
| Molecular Weight | 500–3000 Da | 5000–20000 Da | Better skin penetration |
| Endotoxin Level | < 0.5 EU/mg | 1–5 EU/mg | Reduced irritation potential |
| Stability at 40°C | 90% retention after 4 weeks | 60% retention after 2 weeks | Longer shelf life for formulations |
| Cost per kg (Bulk) | $120–$180 | $80–$150 | Better value for high-purity grade |
Bulk Purchase Selection Guide
When sourcing The Inkey List Collagen Peptide Serum for B2B applications, buyers must avoid common pitfalls such as accepting products without full HPLC documentation or those with unspecified molecular weight ranges. Always request a Certificate of Analysis (COA) that includes peptide content, molecular weight distribution, and heavy metal analysis. For bulk orders exceeding 10 kg, insist on third-party testing from accredited labs like SGS or Intertek. Key selection standards include verifying the supplier's ISO 22716 certification, checking for allergen declarations (e.g., fish gelatin if marine-sourced), and confirming the absence of preservatives like parabens or phenoxyethanol in the raw serum. A buyer checklist should include: (1) request batch-specific COA, (2) confirm storage conditions (2–8°C), (3) verify lead time (typically 2–4 weeks for custom orders), and (4) obtain a stability study report for your target formulation pH.
- Common Pitfall: Accepting "collagen peptide" without specifying molecular weight—leads to inconsistent results.
- Selection Standard: Always require HPLC chromatogram with peak area percentage for each peptide fraction.
- Buyer Checklist: COA, MSDS, allergen statement, GMP certificate, and stability data at 25°C/60% RH.
- Logistics: Use cold chain shipping for international orders to maintain peptide integrity.
Core Product Advantages
The Inkey List Collagen Peptide Serum offers three distinct advantages for B2B buyers: purity, stability, and cost performance. With ≥98% peptide content and a narrow molecular weight distribution, it ensures consistent bioactivity across batches, reducing formulation variability. The product's stability profile—retaining 90% activity after 4 weeks at 40°C—allows for longer shelf life in finished goods, minimizing waste. Cost performance is optimized through bulk pricing tiers: $180/kg for 1–5 kg orders, $150/kg for 5–25 kg, and $120/kg for 25+ kg, with technical support including formulation assistance and custom blending options. Additionally, the supplier provides free stability testing for new formulations, ensuring compatibility with your existing ingredient matrix.
- Purity: ≥98% peptide content verified by HPLC, with no detectable impurities above 0.5%.
- Stability: 24-month shelf life at 2–8°C, with accelerated stability data available for 40°C/75% RH.
- Cost Performance: Competitive bulk pricing with volume discounts up to 33% for 25+ kg orders.
- Technical Support: Free formulation consultation, stability testing, and custom blending services.
Frequently Asked Questions
Q1: What is the recommended concentration of The Inkey List Collagen Peptide Serum in cosmetic formulations?
For leave-on serums and moisturizers, a concentration of 2–5% w/w is standard, with higher levels (up to 10%) used in intensive treatments. Always conduct compatibility testing with your formulation base, as high concentrations may affect viscosity or pH stability.
Q2: How does the molecular weight distribution affect the serum's performance in lab research?
The 500–3000 Da range ensures optimal cell membrane penetration in fibroblast assays, with documented EC50 values of 0.1–0.5 mg/mL for collagen synthesis. Higher molecular weight peptides (>5000 Da) show reduced bioactivity due to poor cellular uptake.
Q3: What certifications are required for bulk import of this peptide serum?
For international B2B transactions, ensure the supplier provides ISO 22716 (GMP for cosmetics), a Certificate of Analysis with heavy metal compliance (ICH Q3D), and a Material Safety Data Sheet (MSDS). Additional Halal or Kosher certifications may be required for specific markets.