Fibroin
molecular structure · PubChem
AKA: Silk fibroin, Fibroin protein
Synthetic
Clean
Fibroins. Protein filaments produced by the silkworm, Bombyx mori
CAS #
9007-76-5
Form
Liquid
Functions
Bulking
Anti-Inflammatory
Moisturizing
Boosts Collagen
Adds volume
Traditional Use
Fibroin is a protein extracted from silk cocoons, used in cosmetics since the mid-20th century. Silk has been valued in Asian skincare for centuries, but the isolated protein ingredient is a modern scientific extraction designed to provide skin-conditioning and film-forming properties.
Skin Types
●all-skin-types
Best For
Loss of Elasticity
Pregnancy & Breastfeeding Safe
Yes
The paper trail
🔬Peer-reviewed1 paper →
⚖️Regulatory1 listing →
🛡️Safety-assessed2 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: CosIng · EWG · CIR