Kérastase Première Bonding Pre-Shampoo Hair Treatment [STEP 1- ACTIVATE REPAIR] deeply restores and intensely repairs all levels of damage for all hair types. This includes damage from heat styling, over-processing, colour treatment, bleaching, and even water in your shower. Formulated with a concentration of 8% Pure Citric Acid and Glycine, the Pre Shampoo acts on inner & outer hair layers to neutralise dullness and stiffness. The formula rebuilds broken keratin bonds to reduce breakage. With its transparent gel texture, the Pre-Shampoo dives deep to help repair persistent damage. Hair is left stronger, healthier-looking, and shinier – as if renewed. Think of it like a skincare routine for your hair. Apply the Première Pre-Shampoo Treatment generously before the shower to damp hair, then after 5 minutes, layer the Shampoo directly on top and lather. Rinse and finish with the Repairing Conditioner as a final step. The Pre-Shampoo helps: Restore up to 99% of hair’s original strength* Reinforce the hairs inner structure** Provide up to 75% more shine.*** 95% of women agree hair looks radically healthy**** *Instrumental test on bleached hair after continued use of the full Première routine vs. non- bleached hair. **Instrumental test after continued use of the Première routine. ***Instrumental test after one use. ****Consumer perception test, 84 women.