China remains a major sourcing base for silk-derived ingredients because it combines established sericulture supply chains with protein extraction, drying, cosmetic-ingredient processing, and formulation capabilities. Asia-Pacific accounted for an estimated 41.03% of global silk-protein demand in 2025, while fibroin represented 33.89% of the category by protein type.

For buyers, however, "silk fibroin" is not a sufficiently precise purchasing specification. A cosmetic-grade hydrolyzed silk, a native high-molecular-weight fibroin powder, a silk peptide, and a regenerated silk-fibroin solution can differ substantially in solubility, molecular-weight profile, purity, odor, microbiological limits, and formulation behavior. Silk fibroin is valued for its biocompatibility, controllable degradation profile, mechanical strength, and ability to form films or hydrogels.

This list is designed for procurement teams looking for stable long-term supply, technical responsiveness, documentation, and private-label or formulation-development support—not simply the lowest quoted price.

Silk Fibroin Manufacturing Process

How We Selected Suppliers

The companies below were shortlisted based on publicly visible relevance to silk fibroin, silk protein, hydrolyzed silk, amino-acid protein ingredients, cocoon-derived materials, or adjacent cosmetic active-ingredient manufacturing. The order reflects suitability for cosmetic and personal-care buyers rather than a claimed market-share ranking.

Key evaluation criteria included:

- Product relevance: Silk fibroin, silk protein, hydrolyzed silk, silk peptides, silk amino acids, sericin, or related protein systems.

- Manufacturing credibility: Evidence of an operating production base, R&D capability, quality system, or industrial-park presence.

- Technical fit: Ability to support powder, aqueous solution, hydrolysate, customized concentration, or finished-formula projects.

- Documentation readiness: Ability to provide COA, SDS, TDS, INCI information, microbiological specifications, allergen statements, and batch traceability.

- Commercial practicality: Sample responsiveness, communication speed, export experience, MOQ flexibility, and lead-time transparency.

- Compliance discipline: Appropriate documentation for the target market rather than generic certificates used outside cosmetic-ingredient regulation.

> Important: CE and RoHS are generally not the primary compliance documents for cosmetic raw materials. CE applies to specific regulated products, while RoHS is mainly relevant to electrical and electronic equipment. For cosmetic silk fibroin, buyers should prioritize INCI alignment, safety data, microbiological controls, restricted-substance declarations, country-specific cosmetic documentation, and evidence supporting any performance claim.

Top 10 China-Based Suppliers

Supplier	Location / Cluster	Main Sourcing Strength	Typical Buyer Fit	Capacity / MOQ	Public Certification Status
ZHENYIBIO TECHNOLOGY INC	Xi'an, Shaanxi	Cosmetic active ingredients, formulation support, flexible OEM/ODM coordination	Small and mid-sized brands; custom projects	Request project quotation	GMP-standard factory stated; verify current documents
Huzhou Aotesi Biotechnology	Huzhou, Zhejiang	Silk protein, fibroin, peptides, hydrolyzed silk	Ingredient distributors and personal-care formulators	Request current capacity and MOQ	ISO 9001 stated publicly; verify certificate validity
Chongqing Haifan Biochemical Technology	Chongqing	Natural proteins, polypeptides, amino acids, silk protein series	Scaled personal-care manufacturers	Request current capacity and MOQ	National high-tech enterprise status stated publicly
Huzhou Xintiansi Bio-Tech	Huzhou, Zhejiang	Silk fibroin and regional silk-protein supply	Buyers seeking Zhejiang silk-processing access	Request quotation	Verify by product line
Hanzhou Linran	Zhejiang region	Silk fibroin / silk-derived ingredients	Bulk ingredient sourcing	Request quotation	Verify by product line
Zhejiang Silk Seekers Biotechnology	Zhejiang	Silk fibroin and related biomaterial ingredients	Buyers requiring specialized silk materials	Request quotation	Verify by product line
Suzhou Suhao BioTech	Suzhou, Jiangsu	Silk-protein and biomaterial-oriented supply	Technical and research-led projects	Request quotation	Verify by product line
Zhejiang Xingyue Biotechnology	Zhejiang	Silk fibroin-related raw materials	Cost-sensitive bulk purchasing	Request quotation	Verify by product line
Xi'an ChinWon Biotech	Xi'an, Shaanxi	Botanical and specialty ingredient sourcing	Brands consolidating multiple active ingredients	Request quotation	Verify by product line
Zhejiang Jiaxin Silk Corp.	Zhejiang	Upstream silk-industry integration	Buyers needing raw-material traceability	Request quotation	Verify by product line

1. ZHENYIBIO TECHNOLOGY INC

Established: 2012

Location: Xi'an High-tech Industrial Development Zone Free Trade Area, Shaanxi, China

Main markets: Asia, Europe, and the Americas

Core strength: Cosmetic active ingredients, plant-derived actives, peptides, hyaluronic acid, polyglutamic acid, liposomes, and customized cosmetic-material solutions.

ZHENYIBIO TECHNOLOGY INC is a practical candidate for buyers who need more than a single bulk ingredient. The company positions itself as a high-tech supplier of natural plant active cosmetic raw materials and reports a GMP-standard factory, an R&D team, raw-material planting resources, and supply relationships across more than 50 countries.

For a silk-fibroin purchasing program, its value is strongest where the buyer requires coordinated support around ingredient selection, formula compatibility, packaging concept, supporting cosmetic actives, and OEM/ODM communication. This can be particularly useful for emerging and mid-sized beauty brands that may not have a dedicated technical sourcing team in China.

Rather than treating silk fibroin as an isolated commodity, buyers can assess whether a supplier can support a complete product-development pathway: raw material, complementary humectants or peptides, prototype refinement, stability planning, documentation, and scalable production coordination.

Recommended for:

- Brands developing silk-protein serums, masks, creams, hair-care products, or ampoules.

- Distributors seeking a broader cosmetic-active portfolio alongside silk-derived ingredients.

- Small and medium-sized brands requiring flexible communication and lower-friction custom development.

- Buyers needing OEM/ODM coordination rather than only a drum or bag of material.

What to verify before purchase:

- Whether the requested material is native silk fibroin, hydrolyzed silk, silk amino acids, or a silk-protein blend.

- Molecular-weight distribution and protein-content test method.

- Available minimum order quantity for trial, pilot, and commercial batches.

- Finished-product OEM/ODM scope, including formula ownership, packaging procurement, and stability testing.

- Current GMP and quality-system documentation applicable to the actual manufacturing site.

Cosmetic Ingredient Quality Verification

2. Huzhou Aotesi Biotechnology Co., Ltd.

Location: Huzhou, Zhejiang

Core strength: Silk protein, silk amino acids, sericin, silk fibroin, silk peptides, hydrolyzed silk, and silkworm-pupa-derived products.

Huzhou Aotesi is one of the more directly relevant suppliers for buyers specifically searching for silk-derived cosmetic ingredients. Public company information identifies its portfolio as including silk protein, silk amino acids, sericin, silk fibroin, silk peptide, hydrolyzed silk, and silkworm pupa powder. It also states ISO 9001 certification, high-tech enterprise recognition, patent activity, and a production site in Huzhou.

Huzhou's location matters. Zhejiang has a long-established silk-processing ecosystem, giving suppliers in the area potential advantages in raw-material access, specialist labor, and silk-related process know-how. The National Silk Museum in Hangzhou also reflects the province's institutional connection to silk history, preservation, research, and innovation.

Recommended for:

- Buyers sourcing multiple silk-protein forms from one supplier.

- Hair-care and skin-care formulators using hydrolyzed silk or soluble silk derivatives.

- Distributors seeking conventional silk-derived ingredient categories.

Watchpoint: Confirm whether the offered "silk fibroin" is intact fibroin, regenerated fibroin, or a hydrolyzed protein. These are commercially and technically different materials.

3. Chongqing Haifan Biochemical Technology Co., Ltd.

Established: 2001

Location: Changshou Economic and Technological Development Zone, Chongqing

Core strength: Natural proteins, polypeptides, amino acids, and personal-care protein ingredients.

Chongqing Haifan is a long-established protein-ingredient manufacturer with a stated focus on research, production, and innovation around natural proteins, peptides, amino acids, and derivatives for personal care. Its catalog includes a dedicated silk protein series alongside collagen, keratin, wheat protein, corn protein, protein surfactants, and polysaccharide ingredients.

The company's product breadth can be useful for manufacturers formulating protein-led hair-care, repair, conditioning, and skin-care products. A buyer developing a product line with hydrolyzed silk, hydrolyzed keratin, collagen, or amino-acid functionality may benefit from consolidating several inputs through one technical supplier.

Recommended for:

- Hair-care manufacturers developing repair, conditioning, shine, or protein-complex products.

- Personal-care brands requiring silk protein alongside keratin, collagen, or amino-acid systems.

- Buyers seeking an established supplier with a broad protein-ingredient catalog.

Watchpoint: Ask for product-specific cosmetic documentation, not only company-level credentials. A quality certificate does not automatically confirm the microbial standard, heavy-metal limits, preservative system, or INCI suitability of every grade.

4. Huzhou Xintiansi Bio-Tech Co., Ltd.

Location: Huzhou, Zhejiang

Core strength: Silk-fibroin-related materials within a mature regional silk-processing cluster.

Huzhou Xintiansi Bio-Tech is frequently included in commercial market reports covering global silk fibroin suppliers. Its Huzhou location places it within a Zhejiang supply network relevant to silk-protein extraction and processing.

For buyers, this company may be worth including in a technical RFQ process when comparing conventional cocoon-derived fibroin against hydrolyzed or modified silk-protein alternatives.

Recommended for:

- Buyers creating a qualified supplier list for silk fibroin powder.

- Procurement teams comparing suppliers from the Huzhou silk-processing area.

- Technical teams that can define molecular weight, purity, moisture, and microbiological requirements.

Watchpoint: Do not assume cosmetic, food, biomedical, and research grades are interchangeable. Obtain a specification written for the intended finished-product use.

5. Hanzhou Linran

Location: Zhejiang, China

Core strength: Silk fibroin and silk-derived raw-material sourcing.

Hanzhou Linran appears in several market overviews as a China-based participant in the silk fibroin category. It should be assessed through a structured RFQ, particularly where the buyer requires a targeted fibroin grade, stable bulk supply, and defined powder or solution parameters.

Recommended for:

- Buyers seeking competitive quotations for conventional silk fibroin.

- Distributors building a multi-supplier sourcing strategy.

- Projects with clearly defined test methods and acceptance criteria.

Watchpoint: Ask the supplier to state whether molecular weight is measured by GPC, SDS-PAGE, or another method. A molecular-weight claim without a stated method is difficult to compare across suppliers.

6. Zhejiang Silk Seekers Biotechnology

Location: Zhejiang, China

Core strength: Silk fibroin and specialized silk-biomaterial applications.

Zhejiang Silk Seekers Biotechnology is referenced among key companies in silk fibroin market reports. The company may be relevant where buyers need a more specialized silk-material discussion rather than only a standard hydrolyzed silk ingredient.

Recommended for:

- Buyers exploring silk fibroin for film-forming, mask, patch, or biomaterial-adjacent concepts.

- Technical teams requiring more detailed material characterization.

- Brands seeking differentiated silk-derived positioning.

Watchpoint: If the end product makes medical, tissue-repair, wound-healing, or therapeutic claims, cosmetic-ingredient documentation alone is insufficient. Evaluate the regulatory pathway in the destination market before development begins.

7. Suzhou Suhao BioTech

Location: Suzhou, Jiangsu

Core strength: Silk protein and biomaterial-oriented supply.

Suzhou Suhao BioTech is included in market reports covering silk fibroin suppliers and is relevant to buyers looking at silk-derived materials beyond conventional cosmetic hydrolysates.

Suzhou has a strong science, manufacturing, and life-science ecosystem. For procurement teams, this makes it a useful region to include when benchmarking technical capability, especially for projects involving film formation, scaffold-like formats, hydrogels, or controlled material properties.

Recommended for:

- Technical development projects with strict material specifications.

- Buyers evaluating higher-value silk fibroin formats.

- Companies needing small development batches before commercial scale-up.

Watchpoint: Require retained samples from every approved batch. Visual appearance alone cannot confirm protein integrity or batch consistency.

8. Zhejiang Xingyue Biotechnology

Location: Zhejiang, China

Core strength: Silk-fibroin-related raw materials and regional sourcing access.

Zhejiang Xingyue Biotechnology appears in supplier lists for silk fibroin raw-material markets. It can be included in a competitive sourcing program, especially when a buyer needs regional supply alternatives to reduce dependence on a single factory.

Recommended for:

- Buyers setting up dual-source supply.

- Cost-sensitive projects that still require documented quality controls.

- Importers requiring several comparable quotations.

Watchpoint: Low pricing should trigger deeper—not lighter—verification. Ask whether the quote includes the same protein content, moisture level, microbial standard, packaging format, and Incoterm as competing offers.

9. Xi'an ChinWon Biotech

Location: Xi'an, Shaanxi

Core strength: Specialty ingredient sourcing and cross-category cosmetic-material support.

Xi'an ChinWon Biotech is listed among companies covered in a global silk fibroin industry analysis. For cosmetic buyers, suppliers in Xi'an can be useful where silk-derived ingredients are being sourced together with botanical extracts, vitamins, amino acids, or other functional cosmetic materials.

Recommended for:

- Buyers consolidating silk proteins with botanical active ingredients.

- Distributors serving natural-cosmetics and functional skin-care customers.

- Brands requiring ingredient portfolio support from one region.

Watchpoint: Confirm the legal manufacturer of the silk fibroin material. A trading company, distributor, and manufacturing site may be different entities.

10. Zhejiang Jiaxin Silk Corp., Ltd.

Location: Zhejiang, China

Core strength: Upstream silk-industry integration and raw-silk supply-chain relevance.

Zhejiang Jiaxin Silk is included in market coverage of the silk protein industry. Unlike a narrowly focused cosmetic-active supplier, an upstream or integrated silk enterprise can be valuable when the buyer prioritizes cocoon origin, silk-chain traceability, or long-term access to silk feedstock.

Recommended for:

- Buyers who place strong emphasis on upstream silk traceability.

- Companies assessing cocoon-to-protein supply-chain visibility.

- Larger organizations establishing strategic sourcing relationships.

Watchpoint: Upstream silk capability does not automatically equal finished cosmetic-ingredient capability. Confirm that the exact product grade is produced under suitable cosmetic-quality controls.

Buyer's Guide and Common Risks

Define the material before requesting quotes

Use a specification sheet that clearly states:

- Required INCI name.

- Intended application: skin care, hair care, mask, patch, rinse-off product, or another use.

- Material form: powder, flakes, aqueous solution, hydrolysate, or encapsulated system.

- Target protein content.

- Target molecular-weight range, if relevant.

- Solubility requirement and recommended processing temperature.

- Moisture, ash, pH, color, odor, and particle-size limits.

- Microbiological limits.

- Heavy-metal and residual-solvent requirements.

- Packaging size, shelf life, and storage conditions.

- Destination market and required regulatory documents.

The most common purchasing mistake

A frequent issue is the use of "silk fibroin" as a broad marketing label for materials with very different compositions. A low-cost "silk fibroin powder" may be hydrolyzed silk, a mixture with sericin, a low-protein carrier blend, or a material whose molecular structure was significantly degraded during alkaline degumming.

The result can be weak film formation, poor solubility, odor changes, color drift, poor batch consistency, or unexpected formulation instability.

An industry-insider verification tip

Ask the supplier to provide two COAs from non-consecutive production batches, not only the batch selected for the sample shipment. Then compare protein content, moisture, pH, microbial counts, color, and molecular-weight data.

A single attractive COA can show the supplier's best batch. Two non-consecutive records reveal whether the process is controlled over time.

Sample approval workflow

1. Send a written technical brief and request the supplier's TDS, COA, SDS, INCI statement, allergen declaration, and origin statement.

2. Request a sample from a traceable production batch, not an unlabeled laboratory sample.

3. Test the material in the intended base formula at normal use level and accelerated stability conditions.

4. Evaluate odor, color, pH drift, viscosity change, precipitation, microbial compatibility, and packaging interaction.

5. Request a pilot batch after the sample is approved.

6. Retain a sealed reference sample from the approved pilot batch.

7. Approve commercial supply only after the pilot batch meets the agreed specification.

Logistics considerations

- Confirm whether the material is hygroscopic and requires moisture-barrier packaging.

- For aqueous silk-protein solutions, confirm temperature limits and preservative compatibility during transit.

- Request the correct HS code from the exporter, but independently validate classification with your customs broker.

- Set Incoterms clearly. FOB, CIF, DDP, and DAP allocate cost and customs responsibility differently.

- Ask whether the factory holds safety stock of key raw materials and whether it can provide batch reservation for annual contracts.

Conclusion

China offers a broad range of silk fibroin and silk-protein sourcing options, from upstream silk enterprises and specialist protein extractors to cosmetic-active suppliers capable of supporting complete formulation projects. The right choice depends less on a supplier's headline claim and more on whether it can consistently meet your required material definition, quality controls, documentation package, and delivery plan.

For brands that require responsive communication, broader cosmetic-active sourcing, and hands-on OEM/ODM development coordination, ZHENYIBIO TECHNOLOGY INC is a practical starting point for a technical discussion. For buyers seeking a direct silk-protein specialist, Huzhou and Zhejiang-based suppliers should be included in a documented comparison process.

Before placing a commercial order, request a specification package, verify batch consistency, run formulation tests, and approve a traceable pilot lot. This process reduces the risk of receiving a silk-derived material that does not match the performance, purity, or compliance profile your finished product requires.

Global Silk Fibroin Sourcing Partnership

FAQ

1. How can I verify that an ISO certificate is not expired or altered?

Request the full certificate, certificate number, scope, issuing certification body, factory address, and expiry date. Check the certificate through the issuing body's public directory where available. Confirm that the listed manufacturing address matches the actual site producing the material.

2. Is hydrolyzed silk the same as silk fibroin?

No. Hydrolyzed silk is generally a lower-molecular-weight breakdown product of silk protein. It may dissolve more easily in cosmetic systems, but it does not necessarily retain the same film-forming or structural behavior as higher-molecular-weight fibroin.

3. What test best confirms that a supplier's material is truly high-molecular-weight fibroin?

Ask for molecular-weight characterization using a stated method, such as GPC or SDS-PAGE, together with protein-content testing. For highly technical projects, consider independent third-party testing and comparison against an approved reference standard.

4. What MOQ should a new brand expect?

There is no universal figure. Trial quantities may range from laboratory samples to small pilot lots, while commercial MOQ depends on form, concentration, packaging, custom processing, and whether the supplier must produce a dedicated batch. Ask separately for sample MOQ, pilot MOQ, and annual-contract MOQ.

5. Can silk fibroin support "anti-aging," "repair," or "wound healing" claims?

The ingredient's functional properties do not automatically justify a finished-product claim. Cosmetic claims must be supported by appropriate product-level evidence and must comply with the laws of the sales market. Wound-healing and therapeutic claims may move a product into a medical-device or drug regulatory category.