Kérastase Première Decalcifying Repairing ShampooKrastase Premire Decalcifying Repairing Shampoo is a rich double action shampoo that works inside and out to remove excess calcium and deeply repair damage for all hair types. Formulated with professional grade ingredients: Pure Citric Acid and Glycine, this shampoo helps repair damage from heat styling, over processing, colour treatment, bleaching, and even water in your shower.