HYDROLYZED SULFONATED KERATIN is graded A (Safe) by Expert·ING, based on COSING regulatory data.

HYDROLYZED SULFONATED KERATIN

Hydrolyzed Keratin

Safety grade: A

Hydrolyzed keratin is a processed form of keratin, a natural protein found in hair and skin, that has been broken down into smaller molecules so it can penetrate hair more easily. It helps repair and strengthen damaged hair while locking in moisture.

This ingredient softens and conditions hair, reduces frizz and breakage, and helps hair retain moisture by forming a protective coating on the hair shaft.

Graded using: COSING.

Last verified: May 26, 2026