The Kérastase Première Décalcifiant Repairing Pre-Shampoo Treatment is a pioneering formula designed to deeply repair damaged, over-processed, and bleached hair by targeting the root cause of brittleness and dullness. Hard water deposits calcium into the hair shaft, and because damaged hair is up to three times more porous than healthy hair, it absorbs significantly more mineral buildup, leaving strands stiff, weak, and lifeless. This treatment's concentrated blend of pure acids works with a powerful dual action: it decalcifies hair by dissolving and removing excess calcium buildup, while simultaneously repairing the hair structure from the inside out, restoring strength, elasticity, and radiant shine. With regular use, breakage is visibly reduced, hair feels softer and more resilient, and its natural vitality is fully restored. Apply before shampooing for a transformative pre-wash ritual that sets the foundation for healthier, stronger hair with every wash.
