Silk Peptide
Appearance: White to off-white powder
Other Name: Silk peptides, Silk peptide powder, Silk peptides powder, Silk extract peptide

Grade: Food grade / Cosmetic grade

Source: Natural silk (Bombyx mori cocoon)

Molecular Weight: Generally below 2,000 Daltons

Amino Acids: Contains 18 essential and silk-characteristic amino acids

Dry Weight Loss: ≤5%

Ignition Residue: ≤3.5%

pH (1% Solution): 5.0–7.0

Water Solubility: 100% water soluble

Description:

Silk peptide, also known as silk peptides or silk peptide powder, is a premium bioactive ingredient derived from the selective enzymatic hydrolysis of natural silk fibroin extracted from Bombyx mori cocoons. Unlike conventional hydrolyzed proteins that remain on the surface of the skin and hair, silk peptide possesses an optimized molecular size—typically below 2,000 Daltons—which enables deep penetration into epidermal layers and the hair cortex. This high bioavailability allows silk peptides to actively participate in cellular repair, amino acid replenishment, and extracellular matrix reconstruction.

Composed of 18 amino acids such as serine, glycine, alanine, and glutamic acid, silk peptides exhibit remarkable affinity with human keratin. Serine, one of its primary amino acids, is known for exceptional hygroscopicity, allowing silk peptide to bind and retain moisture with outstanding efficiency. This structure closely resembles the natural moisturizing factor (NMF) found in human skin, enabling silk peptide to improve hydration, enhance nutrient absorption, reinforce lipid barrier functions, and protect against transepidermal water loss.
Silk peptides form a thin, transparent, breathable microfilm on skin and hair surfaces. This microfilm enhances smoothness, elasticity, and softness while offering protection against UV radiation, free radicals, airborne pollutants, and chemical irritants such as alkaline surfactants. In haircare, silk peptide penetrates damaged cuticles, replenishes missing amino acids, reinforces keratin chains, restores fiber integrity, and delivers a silky sheen and long-lasting hydration. The result is improved tensile strength, reduced split ends, enhanced resilience, and restored softness and shine.

Due to its excellent purity, biocompatibility, and safety, silk peptide has been widely adopted in high-end skincare formulations, professional salon haircare products, oral beauty supplements, functional foods, medical dressings, and regenerative biomaterial systems. Silk peptide’s multifunctional profile—hydration, repair, protection, and structural enhancement—positions it as a superior next-generation raw material in the global personal-care and biomedical markets.

Function:

1. Enhances epidermal regeneration by stimulating cellular metabolism and supporting collagen synthesis, improving firmness, smoothness, and elasticity. Formulations containing silk peptide visibly reduce wrinkles and fine lines.

2. Regulates melanin production by influencing pigment-related enzymes, helping lighten dark spots, brighten complexion, and improve overall skin tone, making silk peptides suitable for whitening and tone-correction formulations.

3. Acts as a natural moisturizing factor. Silk peptide powder binds water in the stratum corneum, prevents transepidermal water loss, and alleviates dryness, tightness, and irritation, improving long-term hydration.

4. Promotes tissue repair by accelerating protein synthesis and soothing inflammation. Silk peptides support recovery from environmental stress, reduce redness and irritation, and improve the appearance of stretch marks, dermatitis, and sensitive skin conditions.

5. Forms a flexible peptide film on hair fibers, strengthening structure, improving elasticity, reducing breakage, and enhancing shine. Silk peptide powder is particularly effective on chemically treated, bleached, or heat-damaged hair.

6. Exhibits excellent biocompatibility and low irritation due to its natural silk origin, making silk peptide suitable for infant care, sensitive-skin formulations, and long-term use in high-end cosmetic systems.

Application:

1. Extremely Outstanding Hair Care Function: Silk peptide demonstrates superior haircare performance due to its absorptive capacity, penetration ability, film-forming property, humidifying effect, and moisture-retention function. Compared with collagen or gelatin hydrolysates, silk peptides are easily assimilated into the hair cortex. Higher silk peptide concentrations increase absorption, especially in damaged hair, resulting in enhanced repair and protection. The peptide film formed exhibits a β-type crystalline structure, improving elasticity, luster, and durability even under high humidity. It prevents moisture loss, reduces split ends and breakage, and serves as an excellent hairspray and styling active.

2. Skin Moisturizing, Nourishment, and Wound-Repair Effect: Silk peptides provide moisturization, nourishment, and protective benefits for the skin. They help address wrinkles, dermatitis, pruritus, chloasma, and pigmentation disorders by accelerating epithelial repair, enhancing nutrient absorption, and forming a defensive microfilm against dust, acids, alkalis, and chemical irritants. Long-term use of skincare products enriched with silk peptide powder reinforces the epidermal barrier, maintains hydration, improves texture, and prevents various skin concerns caused by environmental exposure.

3. Nutraceutical and Functional Food Applications: Silk peptide powder offers easily digestible and rapidly absorbable amino acids, making it ideal for oral beauty supplements, collagen beverages, protein formulations, and anti-fatigue products. It supports cellular metabolism, aids tissue regeneration, improves skin condition from within, and provides comprehensive beauty and wellness benefits when combined with topical skincare.

4. Biomedical and Regenerative Material Applications: With excellent biocompatibility, low immunogenicity, and structural affinity, silk peptides are used in wound dressings, dermal-protection materials, regenerative scaffolds, and therapeutic delivery systems. Their ability to support epithelial growth, strengthen tissue structure, enhance cell adhesion, and protect fragile skin makes silk peptide suitable for advanced medical, clinical, and regenerative applications.

Silk Peptide Powder — FAQ Section