HOW TO USE

Step 1: Layer a coin-sized amount of the Kérastase damage repair shampoo on wet hair on top of the Concentré Décalcifiant Ultra-Réparateur.*

Step 2: Using your fingertips, massage gently and emulsify.

Step 3: Rinse thoroughly and ensure that no residue is left.

Step 3: For best results, follow it up with Première Mask and Première Serum.*

SCIENCE

How To Dramatically Reverse Persistent Damage?

Kérastase discovered the reason behind damage that keeps coming back: CALCIUM!

3x

More calcium is absorbed with damaged hair as it is more porous (vs healthy hair), leading to a calcium overdose

PERSISTENT

Damage happens when calcium sneaks in-between keratin chains, breaking their links, making hair rigid, stiff and easy to break

BUILD-UP

Of calcium on the outside makes hair rough and dull

Pure Acids Concentration
Free hair from calcium overdose with citric acid, an organic acid that acts from core to surface, to neutralize dullness and stiffness. Once calcium is removed, Glycine, an amino acid, penetrates hair's inner layer to deeply repair. As a results broken links between keratin chains are reconnected, dramatically reducing breakage.