Keratin Protein Ester is a specialty cosmetic ingredient derived from natural keratin protein and fatty acid esters. It is designed to deliver high substantivity, strengthening, and conditioning to hair, nails, and skin. The esterification makes keratin more oil-compatible, allowing better absorption and long-lasting protection.
CAS No: Proprietary (cosmetic-grade complex)
Appearance: Pale yellow to amber viscous liquid or soft paste
Chemical Type: Protein-derived ester (functional active)