Abril Et Nature Bain Shampoo Keratin repairs and regenerates damaged keratin structures, restoring hair’s natural health and beauty. Its unique formula contains keratin protein fractions of varying sizes: larger molecules form a protective film sealing the cuticle, while smaller ones penetrate the cortex to repair from within. This dual action enhances softness, shine, and moisture, leaving hair energized and revitalized. The keratin proteins closely resemble natural hair keratin, ensuring highly effective restoration for stronger, smoother hair.