Recombinant humanized collagen has gone from a niche Chinese ingredient to a global search term, and buyers now see Type III and Type XVII quoted side by side. This guide covers what each is positioned to do, how they are made, what the COA should show, where the cosmetic-grade boundary sits, and how to decide. It is written for business buyers of raw material and covers no finished-product claims or medical use.
What "recombinant humanized" means
It is a protein made by a microbial host (usually Escherichia coli or the yeast Pichia pastoris) from a gene encoding a fragment, or repeated fragment, of a human collagen sequence. It is animal-free, with no BSE/TSE or fish-allergen concern. China's industry standard YY/T 1888-2023 distinguishes recombinant human collagen (full-length sequence), recombinant humanized collagen (fragment or repeat) and recombinant collagen-like protein (designed sequence). Almost every cosmetic-grade product falls into the second group; ask the supplier to state category, human collagen type and host.
Type III: the dermal repair and moisturising story
Type III collagen is abundant in young dermis alongside Type I and declines with age. Recombinant fragments derive from the human COL3A1 sequence and are positioned for repair, barrier support, hydration and elasticity in serums, essences, masks and post-procedure skincare. It is the more mature product: more sources, more molecular-weight options, more safety data and a lower price.
Type XVII: the dermal-epidermal anchoring story
Type XVII collagen (COL17A1, also called BP180) is a transmembrane protein of the hemidesmosome, which anchors basal keratinocytes to the basement membrane, and is also expressed in hair-follicle stem cells. Published research links its age-related loss to thinner epidermis and follicle miniaturisation, so brands position recombinant Type XVII fragments for junction support, firmness and scalp care. It is newer: fewer producers, a higher price per gram, and the fragment is typically part of the extracellular domain, not the full protein.
Side-by-side comparison
| Parameter | Recombinant Type III | Recombinant Type XVII |
|---|---|---|
| Human origin | COL3A1 fragment or repeat | COL17A1 extracellular-domain fragment |
| Skin location referenced | Dermis, fibrillar network | Dermal-epidermal junction, hemidesmosome, hair follicle |
| Typical positioning | Repair, moisturising, elasticity, post-procedure | Junction anchoring, firmness, scalp and hair |
| Molecular weight | Product-specific, commonly tens of kDa; stated on spec sheet | Product-specific, stated on spec sheet |
| Market maturity | Mature, many sources | Emerging, few sources |
| Relative price | Lower | Higher |
Expression system, molecular weight and purity
E. coli is the most common and cheapest host, but its products are usually non-hydroxylated and do not form a stable triple helix at skin temperature, so "triple-helix" claims need a circular dichroism or similar result on the COA. Pichia secretes the protein and often gives lower endotoxin, at higher cost. Molecular weight is set by fragment length and repeat number, not by collagen type, so two suppliers' Type III can differ several-fold in kDa; ask for SDS-PAGE or mass spectrometry data. Purity must name the method: SDS-PAGE densitometry and RP-HPLC give different answers on the same lot.
Formulation handling
- Add to the water phase in cool-down, below 40 °C.
- Keep pH in the neutral to mildly acidic range and avoid high ethanol, strong oxidisers and strongly cationic surfactants.
- Proteins feed microbes: use a robust preservative system and run challenge testing.
- Store sealed, cool, dry and away from light; refrigerate opened solutions.
- Run stability on the final formula; supplier data are for the neat material.
Cosmetic grade versus medical-device grade
In China recombinant collagen for injection, wound dressings and implants is a medical device (Class II or III) with sterility, injectable-endotoxin and biocompatibility requirements. Cosmetic-grade material is released for topical use only and is not made or tested to that standard. A supplier offering one lot for "cosmetic or medical use" is mis-describing it. WYOO supplies cosmetic-grade Type III and Type XVII for topical products only.
How to read the COA
- Identity: expression host, human collagen type and category stated.
- Purity by SDS-PAGE or HPLC with the method and acceptance limit.
- Molecular weight by SDS-PAGE or MS, matching the spec sheet.
- Protein content, water content and pH of solution.
- Endotoxin by LAL, host-cell protein and residual DNA with limits.
- Heavy metals, total plate count, yeast and mould, specified pathogens.
- Lot number, manufacture date and retest date that match the container.
How to choose
Choose Type III for repair, hydration, elasticity or post-procedure briefs, when budget matters, or when you need molecular-weight options and supplier choice. Choose Type XVII for firmness, junction support or scalp and hair, when the brand will pay for a newer, differentiated story. Many launches use both.
Commercial terms and how WYOO handles enquiries
WYOO is a sourcing partner with audited partner factories, not a manufacturer. Standard terms are MOQ 50 g, lead time 5 to 10 working days after payment for in-stock lots, payment by T/T with 30% deposit and 70% before shipment for B2B accounts, a batch COA with every shipment, and a free 5 g sample for qualified companies with freight paid by the buyer. We send the COA before payment, arrange third-party testing on request, and quote in English, Chinese, Spanish, German or French within one business day.
Questions fréquentes
- Can recombinant collagen Type III and Type XVII be used in the same formula?
- Yes. Many brands pair them, positioning Type III as the dermal repair and moisturising story and Type XVII as the dermal-epidermal junction and firmness story. Both are water-soluble proteins added in the cool-down phase, so the formulation rules are the same; run stability and preservative-efficacy tests on the combined system rather than assuming the data for one applies to both.
- What should the COA of a recombinant humanized collagen show?
- At minimum: appearance, purity by SDS-PAGE or HPLC with the method named, molecular weight, protein content, endotoxin by LAL, host-cell protein and residual DNA, water content, pH of solution, heavy metals and microbial limits, plus the expression host and the human collagen type the sequence is derived from. A sheet that gives a purity figure with no method or lot number is marketing, not a release document.
- What are the MOQ, lead time and sample policy for recombinant collagen raw material?
- WYOO's standard terms for cosmetic-grade recombinant collagen Type III and Type XVII are MOQ 50 g, lead time 5 to 10 working days after payment for in-stock lots, payment by T/T with 30% deposit and 70% before shipment for B2B accounts, a batch COA with every shipment, and a free 5 g sample for qualified companies with freight paid by the buyer.