What is Cosmetic grade Silk peptide powder?

Cosmetic grade Silk peptide powder is partially hydrolyzed silk fibroin powder by the degradation of silk fibroin protein. It is highly skin and hair compatible, whose molecular weight is between 500 and 10000, a white powder with good water-solubility, the ninhydrin reaction is positive. It imparts a silky, smooth feel to the skin. Use at 2 – 5% by weight in creams, lotions, shampoos, conditioners, bubble baths, shower gels, and other skin and hair care products.

Silk is the long continuous fiber consists of two fibroins and the sericin covering the outside.

The general composition of silk fiber:

  • Fibroin 70-80%
  • Sericin 20-30%
  • Lipid 0.4-0.8%
  • Hydrocarbon 1.2-1.6%
  • Pigment approximately 0.2%
  • Ash content approximately 0.7%

Natural Silk Culture and History

Silk is a natural protein fiber, and the Chinese often weave it into textiles, the protein fiber of silk composed of fibroin. The larvae of the mulberry silkworm Bombyx mori reared in sericulture is the best-known silk source. The shimmering appearance of silk is due to the silk fiber’s triangular prism-like structure, which allows silk cloth to refract incoming light at different angles, thus producing different colors.


Silk peptide powder for skin care

  1. It has the functions of natural moisturizing and skin nourishing
  2. Possessing the action of inhibiting melanin production.
  3. Promoting the regeneration of skin tissue, guard against chapping and chemical damage.
  4. Inhibiting skin cancer.
  5. Silk peptide powder also possesses the function of antioxidants.

Silk peptide powder for hair care

It has a hair-caring function depends on the absorbency, absorptivity, film-forming ability, and moisturizing type it received by hair. Compared with other protolysates (collagen, bone collagen, glutin, Etc.), fibroin’s most prominent feature is that the hair easily absorbs it.


CharactersWhite powder, easy deliquescence
IdentifyNinhydrin reaction is positive
Total Nitrogen≥14.5%
Loss on Drying5.0%
Residue on Ignition3.0%
PH Value4.5.0-6.5
Average Molecular Weight500-30000 Da


  • 25Kg/Fiber Drum, double plastic bag inside, with carton outside.
  • Sample – aluminum foil bag vacuum packing.

Where to buy cosmetic grade Silk peptide powder?

Just send an email to [email protected], or submit your requirement in bottom form. We are of service at any time!