KÉRASTASE Bain Extentioniste Strengthening Shampoo, 8.5 fl oz — daily fortifying formula for damaged, brittle lengths

This lightweight cleansing treatment targets overstressed, brittle hair that needs rebuilding from root to tip. The formula combines amino acids, Creatine R, ceramides and taurine to support hair fiber integrity, lock in moisture and leave hair feeling stronger and more resilient after repeated use. It’s designed to be used as part of the Extentioniste/Resistance regimen to optimize results for slow-growing or damaged hair.

How does this shampoo strengthen damaged lengths?

The shampoo works by gently cleansing while delivering building-block ingredients that bond to weakened fibers. Amino acids and Creatine R help reinforce internal structure, while ceramides and taurine support surface hydration and protection, so strands look healthier and feel less fragile.

• Contains amino acids to support fiber reconstruction
• Creatine R helps reinforce hair’s internal matrix
• Ceramides lock in moisture for smoother cuticles
• Taurine adds protective and energizing effects for the scalp

Will it help with split ends and breakage?

While no shampoo can permanently repair split ends, regular use reduces their appearance and minimizes further breakage by strengthening the hair shaft and improving manageability. When combined with conditioner and a mask from the same line, overall fiber resilience improves and fragile ends are better protected.

• Reduces visible fraying by fortifying weakened lengths
• Improves slip for gentler detangling and less mechanical breakage
• Works best with Extentioniste conditioner and Therapiste mask

How should I use Bain Extentioniste for best results?

Use on wet hair, applying a quarter-size amount and massaging through lengths and ends until it lathers. Rinse thoroughly and follow with Resistance Extentioniste Conditioner; add the Therapiste Hair Mask weekly for intensive reinforcement.

• Apply to wet hair, massage into lengths and ends
• Rinse fully and follow with matching conditioner
• Use mask periodically for deep repair; ideal for heat-stressed hair

Is this shampoo suitable for daily use and all hair types?

Formulated as a daily shampoo, it is lightweight enough for routine cleansing but targeted at damaged, slow-growing or brittle hair that needs fortification. Those with normal to oily scalps can use it regularly; very fine hair may prefer less frequent application if weighed down.

• Designed for daily cleansing of damaged or stressed hair
• Lightweight texture prevents heavy residue when used properly
• Best paired with other Resistance/Extentioniste products for full benefits

Who is this for: KÉRASTASE Bain Extentioniste is intended for people with damaged, over-processed or slow-growing hair who want to strengthen lengths, improve manageability and reduce the visual effects of split ends. It’s a good choice if you regularly use heat tools, color or chemical services and are looking to reinforce hair structure as part of a consistent care routine.

Ingredients

Water, Sodium Laureth Sulfate, Coco-Betaine, Taurine, Cocamide Mipa, Sodium Chloride, Amodimethicone, Laureth-5 Carboxylic Acid, Ppg-5-Ceteth-20, Sodium Benzoate, Sodium Hydroxide, Citric Acid, Polyquaternium-10, Peg-55 Propylene Glycol Oleate, Propylene Glycol, Peg-60 Hydrogenated Castor Oil, Salicylic Acid, Amyl Cinnamal, Hexyl Cinnamal, Benzyl Alcohol, Linalool Hydroxycitronellal, Citronellol, Limonene, Creatine, 2-Oleamido-1,3-Octadecanediol, Benzyl Cinnamate, Sodium Acetate, Isopropyl Alcohol, Fragrance.