Cosmetic Grade Silk Fibroin Skincare Raw Material
Silk Fibroin: Product Introduction
Silk fibroin is a natural high-molecular-weight fibrous protein extracted from silkworm silk, accounting for approximately 70% to 80% of the silk's composition. It contains 18 amino acids, with glycine (Gly), alanine (Ala), and serine (Ser) making up over 80% of the total composition. Silk fibroin possesses excellent mechanical and physicochemical properties, such as good flexibility and tensile strength, breathability, moisture permeability, and sustained-release properties. Because silk fibroin and human skin proteins are both fibrous proteins and share many structural similarities, the affinity of silk fibroin and its hydrolysates for human skin is unparalleled by any other natural protein. It can block ultraviolet rays from sunlight, preventing sunburn, and its unique ability to trap oils, through the action of silk powder, enhances the affinity between the skin and oily components, making it widely used in cosmetics and personal care products.
Silk fibroin is a natural high-molecular-weight fibrous protein extracted from silkworm silk, possessing the following characteristics:
- Good mechanical properties: Silk fibroin exhibits excellent strength and toughness, making it suitable for medical applications requiring a certain level of mechanical strength.
- Biocompatibility: Silk fibroin has good compatibility with human tissues and is unlikely to trigger an immune response.
- Degradability: It can be gradually degraded and absorbed within the human body; the degradation time is controllable, and the degradation products are safe.
- Rich amino acid composition: Rich in 18 amino acids, it helps promote skin repair and cell regeneration. Structurally, silk fibroin consists of crystalline and amorphous regions. The crystalline regions are responsible for its high toughness and tensile strength, while the amorphous regions provide high ductility and elasticity.
Health Benefits
Moisturizing and Barrier Repair
Silk fibroin contains 18 amino acids and various trace elements, exhibiting strong affinity with human skin and being easily absorbed. Modern biochemical and nanotechnology further enhances the skin's absorption of silk fibroin and other trace elements. Silk fibroin increases the moisture content of the stratum corneum, promotes collagen synthesis, enhances skin elasticity and firmness, promotes pigment decomposition, and evens skin tone.
Sunscreen and Whitening
The acetaminophen in silk fibroin can undergo a photochemical reaction with ultraviolet rays, reducing their damage to the skin. Studies have shown that when 25% silk fibroin is added, its UV absorption rate reaches as high as 70%. Silk fibroin can also inhibit the formation of tyrosinase, thus contributing to whitening.
Anti-aging
The various amino acids in silk fibroin revitalize cells and maintain skin elasticity. Its lysine content accelerates skin metabolism and prevents wrinkle formation.
Hair Nourishment
Silk fibroin contains natural high-molecular-weight proteins from silk, combined with liquid intelligent repair factors, to precisely repair and comprehensively infuse hair with energy, deeply repairing hair from the inside out. It provides step-by-step repair for permed and shaped hair, fundamentally solving problems such as dryness, frizz, brittleness, split ends, dullness, and tangles.
Wound Dressings
Silk fibroin, in its various forms, can be used in dressings to promote skin regeneration and healing. Wound healing is a complex process involving many interactions between cells and the cell matrix. Wound dressings made with silk fibroin not only possess the same moisturizing, breathable, and wound-repairing properties, but also have better tensile strength and elongation, and are more stable and less likely to trigger an immune response in the body.
Application Areas Overview
Cosmetics: Applied to various skincare products—improves dull and lackluster skin, repairs the skin barrier, moisturizes the skin, promotes collagen synthesis, and increases skin elasticity.
Haircare: Deeply repairs hair damaged by perming, dyeing, etc., improves hair elasticity and shine, nourishes hair strands, and enhances hair resilience.
Biomedical: Wound Repair: Formulated into hydrogels, membranes, scaffolds, and other dressings, it keeps wounds moist and breathable, promotes cell proliferation and collagen deposition, and accelerates wound healing, especially suitable for burns and chronic wounds.

Why Choose YTBIO's Silk Fibroin?
We own our factory and have over 12 years of experience in the cosmetic and functional raw material industry.
We possess comprehensive international certifications, with our production system certified by cGMP, FSSC22000, BRC, HACCP, HALAL, KOSHER, ISO9001, and ISO22000.
We also offer a one-stop customized service for Silk Fibroin, whether for existing specifications or based on your specific needs.
Interested in our Silk Fibroin? For COA, samples, or the latest quote, please contact YTBIO at any time.
Email:sales@sxytbio.com
WhatsApp/phone:+86 17782577059











