Smart-starter conditioner for over-processed fine hair


Fiber quality renewal care for fine hair. The 1st conditioner created to be used before shampoo to repair very damaged fine hair without weigh-down effect. Thanks to its innovative technology, Soin Premier Thérapiste plays the role of a smart starter. Formulated to bind the hair in the manner of a protective gauze, it works upstream to infuse the fiber with softness so it is protected during washing.

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Soin premier Résistance Thérapiste - Kérastase

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SOIN PREMIER THÉRAPISTE is rated 4.6 out of 5 by 117.
Rated 5 out of 5 by from Condition bliss I have been using this product for almost a year. I use it before my shampoo and I can comb through my hair with ease. It has done amazing things to my hair. I can’t be without this one. It also works after shampoo as a conditioner. You don’t need a lot. I Love my hair again
Date published: 2018-07-11
Rated 5 out of 5 by from Great to restore hair I used this product for a year when I was transitioning from a color treated red/black to blonde. It was amazing and kept my hair from breaking. Once my hair was back to normal health I moved to the same line but the less damaged shampoo and conditioner. If you don't graduate to the less damaged line your hair will get oily.
Date published: 2018-05-22
Rated 5 out of 5 by from Amazing Product I have been using this product on my mid-back length dyed blonde hair for just over a week now. I must say that from the very first use I noticed a difference in the condition/look/feel of my very dry ends hair. It smooths the ends and actually makes the hair feel more substantial and strong. I am extremely happy with this product and for once am hopeful that my hair may actually start to grow again (haven't seen significant growth in years!).
Date published: 2018-04-08
Rated 2 out of 5 by from It's OK I have very damaged dry hair so I thought I would try this line. This product is OK but leaves the scalp feeling greasy and my ends feeling like straw. I used the bain shampoo afterwards like it said in the directions but my hair felt awful. I tried using the shampoo first and the conditioner after and it was the same effect. I have used too much of the product to return it and I don't want to bother paying to return the items. Not recommended for fine damaged hair- especially if you tend to build up oil on your scalp. I will be purchasing another Kerastase line next time.
Date published: 2018-02-15
Rated 5 out of 5 by from Best I've ever used I used this shampoo/conditioner combo and, hands down, it is the best treatment I've ever used on my prone-to-breakage hair.
Date published: 2017-12-08
Rated 1 out of 5 by from Great concept - but didn't do the job. I bought this after getting a sample of the matching shampoo and being happy with the results of the shampoo. I have very fine hair that will get oily at the roots if I don't wash at least every other day and the result is that my ends are very dry and this seemed like the solution. I used it as directed - conditioner first and then the Bain Therapiste shampoo (which I also purchased) second. My hair has never been so prone to static! It is dry and I certainly can't justify the cost with the results. I'm disappointed.
Date published: 2017-11-11
Rated 5 out of 5 by from Love this line! I purchased the soin premier therapiste along with the matching shampoo a few months back. I have thin strands of hair but a lot of it. My hair is highlighted and I blow dry my hair daily. My hair has become very dry and damaged over time. I tried this conditioner/ shampoo line and it is amazing! It has helped hydrate my hair and has made it very soft! It doesn't weigh down my hair. My favorite part is that I'm able to use this conditioner/shampoo combo every other day. I haven't been able to go a day without washing my hair usually but I can skip a day in between washes with this line. I love it and will continue to purchase again!
Date published: 2017-10-04
Rated 3 out of 5 by from Ce produit alourdit le cheveux Bonjour. J'étais curieuse d'essayer ce produit en particulier mais malheureusement, le trop-plein de silicone alourdit le cheveux. J'ai l'impression que les cheveux se "plastifie". Déçue
Date published: 2017-06-03
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The Soin Premier is a conditioner created to be used before shampoo to repair very damaged fine hair without weigh-down effect.
FOR WHO? For very damaged and over-processed hair (erosion level 3-4). Dedicated to fine hair.
WHAT DOES IT DO ? The fiber is protected from washing. • Each fiber is repaired, soft and light. • Prevents hair from weighting-down.


Before shampooing, apply to damp hair so the fiber can gently absorb it to protect it without weight.

Massage onto lengths and ends.
Leave in for 2-3 minutes, emulsify and rinse thoroughly.


FIBRA-KAPTM: compensate for the missing KAPs and reactive their synthesis.
• SP 94, supplies the follicle with the energy necessary to activate KAPs synthesis
• 6 amino-acids characterized by their capacity to attach themselves to damaged areas of the hair
• 1 wheat protein redivative helps restore uniformity and smoothness.
Sève de résurrection: known for its regenerating power