Keratin hair mask is produced by the Ukrainian brand Dr. Sante for its Keratin line. It is specifically designed for dull and brittle hair. The mask restores damaged hair structure, nourishes the hair, improves hair elasticity, and restores its natural, healthy shine.The product is formulated with Pro-Keratin Complex, a combination of keratin, arginine, and collagen. Free of parabens and mineral oil.Active ingredients of the Pro-Keratin Complex contained in the mask have a multi-faceted effect on the hair.