Hydrolyzed Hair Keratin

Hydrolyzed Hair Keratin molecular structure
molecular structure · PubChem
AKA: Keratin Hydrolysate, Soluble Keratin, Hair Protein Hydrolysate
Synthetic
Skin Conditioner
Hair Care
Not Clean
Keratins, hydrolyzates. A biological material consisting predominantly of partially hydrolyzed keratin
CAS #
65997-21-9, 69430-36-0
Form
Powder
Functions
Hair Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Skin Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Locks in moisture
Traditional Use
Keratin, the primary structural protein in hair, began being extracted and used in cosmetics in the mid-20th century to repair damaged hair. Hydrolyzed hair keratin was developed to create smaller peptide chains that can penetrate the hair shaft and restore strength and shine.
EWG
3
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not an Irritant
medical-approval
all-shades-safe
Regulatory Status
USA✔ permitted
EU✔ permitted
JAPAN✔ permitted
CANADA✔ permitted
Skin Types
●all-skin-types
Best For
Dryness
Pregnancy & Breastfeeding Safe
Yes
The paper trail
🔬Peer-reviewed1 paper →
⚖️Regulatory0 listings
🛡️Safety-assessed2 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: CosIng · EWG · CIR