Remove. Repair. Reveal Stronger Hair.

Kérastase Première Decalcifying Repair Shampoo is the innovative, science-forward cleansing treatment from Kérastase's Première collection — the brand's first haircare line designed to target the dual damage caused by hard water mineral buildup and structural hair fiber degradation simultaneously. Hard water — water with high concentrations of dissolved calcium and magnesium minerals — is present in the majority of homes and is one of the most common yet underrecognized sources of progressive hair damage. With every wash, hard water deposits a film of calcium carbonate and other minerals onto the hair shaft and scalp, gradually dulling shine, roughening the cuticle, inhibiting the effectiveness of other hair care products, and contributing to dryness, brittleness, and breakage. Kérastase Première's decalcifying shampoo addresses this hidden damage source head-on, combining a targeted chelating complex that removes mineral deposits from the hair and scalp with a reparative formula that simultaneously rebuilds and reinforces the hair fiber — delivering cleaner, stronger, smoother, and more radiant hair with every use.

Key Benefits

• Decalcifies the hair shaft and scalp by chelating and removing hard water mineral deposits (calcium, magnesium) that dull, stiffen, and damage hair
• Simultaneously repairs and reinforces damaged hair fiber, reducing breakage and improving resilience
• Restores hair's natural shine and luminosity by smoothing the cuticle and removing the mineral film that blocks light reflection
• Improves the effectiveness and penetration of subsequent conditioners, masks, and treatments by removing the mineral barrier
• Suitable for all hair types experiencing hard water damage, dullness, stiffness, or resilience loss
• Professional Kérastase formula in a convenient 80ml travel or trial size

Suggested Use

Apply to wet hair and scalp, lather thoroughly, and massage from roots to ends. For best decalcifying results, allow the shampoo to sit on the hair for 2–3 minutes before rinsing to give the chelating agents adequate contact time to bind and remove mineral deposits. Rinse thoroughly with lukewarm water. Follow with a Kérastase Première conditioner or masque to maximize reparative benefits and lock in moisture after the decalcifying cleanse. Can be used regularly as a primary shampoo or incorporated as a weekly or bi-weekly treatment alongside your regular shampoo routine, depending on the severity of hard water exposure and mineral buildup. Avoid contact with eyes.

Key Features

• Decalcifying Chelating Technology: The cornerstone of Première's innovation is its chelating complex — chelating agents are molecules that form stable bonds with metal ions (such as calcium and magnesium from hard water) and effectively "capture" and remove them from the hair surface during rinsing. This decalcifying action dissolves and removes the invisible mineral layer that accumulates with repeated hard water washing — a layer that is responsible for the dullness, stiffness, rough texture, and reduced manageability that hard water sufferers experience and often misattribute to dryness or damage alone
• Simultaneous Repair Technology: Unlike dedicated clarifying shampoos that remove buildup but offer no reparative benefit — and can actually leave hair feeling stripped and vulnerable — Kérastase Première combines decalcification with active hair fiber repair. The formula includes Kérastase's proprietary bond-strengthening and structural repair technology that works within the hair fiber during cleansing to reinforce weakened protein bonds, reduce breakage, and improve the hair's mechanical resilience and elasticity
• Hard Water Damage Reversal: Hard water is estimated to affect more than 85% of homes in the United States and is one of the leading causes of progressive hair dullness, color fade (in color-treated hair), and treatment inefficacy — because the mineral layer physically blocks the penetration of conditioning and reparative ingredients. By removing this barrier, Première Decalcifying Shampoo not only improves the hair's immediate appearance and feel but also dramatically enhances the effectiveness of every other hair care product applied afterward
• Kérastase Professional Heritage: Première represents Kérastase's latest evolution in hair science — bringing the brand's six-decade legacy of professional-grade innovation to address a damage source that has long been overlooked by mainstream hair care. Like all Kérastase products, Première is developed in collaboration with leading hair scientists and salon professionals, formulated to deliver visible, measurable results that elevate the hair care experience from routine maintenance to transformative treatment