Hydrolyzed Fibroin
AKA “Silk Fibroin Hydrolysate, Hydrolyzed Silk Protein
Synthetic
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Ingredient Facts
Hydrolyzed fibroin
AKA: Silk Fibroin Hydrolysate, Hydrolyzed Silk Protein
Synthetic · Hair Conditioning | Skin Conditioning · EWG: 4
Plant-Derived
Skin Conditioner
Hair Care
Synthetic
Clean
Protein hydrolyzates, fibroin Science: Process: Hydrolysis | Functions: Hair Conditioning, Skin Conditioning Safety Ratings: CIR: Safe as used
Form
Liquid
Plant-Derived
Animal-Derived
Function
Hair Conditioning | Skin Conditioning
Benefits
Locks in moisture
Traditional Use
Fibroin is the primary protein in silk; sericulture dates back thousands of years in Asia. Hydrolyzed fibroin was developed in the 20th century for cosmetics to provide silk's traditional skin-smoothing and conditioning benefits.
Skin Types
all-skin-types
Best For
Target
Dryness
Melanin-Rich Skin
Suitable
Pregnancy Safe
Yes
EWG Score4
CIR Safety Findings
medical-approval, all-shades-safe, Not Phototoxic
Regulatory Status
USAunder review
EUrestricted
JAPANrestricted
CANADArestricted
Verified Feb 2026
Data: CosIng · EWG · CIR