This Kérastase Bain Décalcifiant Réparateur is a high-performance shampoo specifically formulated for the restoration of damaged hair. It actively works to remove mineral buildup, primarily calcium, which often accumulates on hair sensitized by hard water, leading to dullness and potential breakage. By neutralizing these deposits, the formula primes the hair fiber, allowing subsequent repair treatments to penetrate more effectively. Ideal for a deep cleanse and intensive restoration routine, this shampoo enhances brilliance, softness, and overall resilience, bringing damaged lengths back to a healthier state.