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Kerastase Résistance Extentioniste Shampoo and Conditioner Review

Kerastase Shampoo and Conditioner to help grow damaged hair

My hair is damaged and dry. It’s my own fault really, I was the one that insisted on getting a loose body perm and then added a few highlights a couple months later. I also use a lot of heat in my styling. I’ve managed to repair a lot of the damage with Olaplex and repeated in salon and at home Kerastase Fusio Dose treatments, but I was searching for a new shampoo and conditioner duo that would baby my damaged hair a bit, without weighing it down.

At my last hair appointment I told my stylist (I see Tiffany at One One Nine in Ann Arbor, Michigan) that despite my damage and the breakage I was seeing every day, I wanted to try to grow my hair out longer. Tiffany immediately recommended the new Kerastase Résistance Bain Extentioniste Shampoo and Fondant Extentioniste Conditioner duo.

The Résistance Extentioniste products feature 2 main ingredients to help your damaged hair. The first is Creatine, which penetrates down into the hair shaft to “reinforce” the internal structure of the hair. The second ingredient(s) are ceramides, to smooth the surface of the hair. When the shampoo and conditioner are combined with the scalp and hair serum (Serum Extensioniste), they found 99% less breakage and 78% fewer split ends.

The first time I used the Résistance Extentioniste shampoo and conditioner I saw a difference in my hair and the breakage of my ends. It felt softer and smoother even without any products applied, and after brushing my hair there were no longer little broken hairs all over the counter. I was amazed! And the results seen to get better as I use the shampoo longer.

I’ve had the Résistance Extentioniste products for about 4 weeks now, and while I’m not sure my hair is growing any faster (confession: my hair grows pretty fast on its own), I do think that it is breaking a lot less. Less breakage means I won’t need to trim as much of my hair off at my routine appointments, and in the long run my hair will grow longer faster.

I know I’ll be repurchasing the Résistance Extentioniste shampoo and conditioner. Are you trying to regrow your hair also? Let me know what you’re doing to make your hair healthier in the comments!

I’ve since purchased the serum, mask and blow-dry primer.

I honestly can’t tell what (if anything) the serum adds to everything. It says to apply to scalp and hair. I’ve applied to both, one or the other… I don’t notice much. I wonder if it is meant to do something over time, but I’m unsure about that, so I’d recommend skipping that product.

The mask is definitely worth the splurge! I’ve been using it about once a week instead of the regular conditioner and it is amazing. It does everything the regular conditioner does but with more moisture. It does not weigh down my hair. I definitely recommend buying this one. The jar will likely last me 4-5 months, so spread out the cost isn’t too bad.

The blow-dry primer is also a good buy. I have a ton of blow dry primers (I’ve run out of storage space, again, for all of my hair styling products. I have a weakness for them). This one works well for smoothing frizz and preparing my hair styling. If you have a lot of damage I’d recommend checking this out as well.

Kerastase Résistance Bain Extentioniste Shampoo and Fondant Extentioniste Conditioner
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  1. Rebecca
    July 6, 2018 / 12:20 am

    I’m a longtime user of the Resistance line, especially the masque and leave-in conditioner, even though I don’t like the smell, because it’s so effective at softening and smoothing damaged ends and “reviving” dry, over-processed hair. Have you ever used that, to be able to compare it to the new Extentioniste line? Does the new line have that same “bug spray” fragrance?
    Thank you.

    • 15mins
      July 6, 2018 / 2:47 pm

      I’ve used all of the Resistance line basically, and I agree with you about the scent of many of the products! In my mind they’re “bad, overwhelming cologne”. I actually couldn’t remember the scent at all of these products (I guess that’s why I didn’t mention it like I usually do in my post). I had to go back to my shower to check it out! There is a bit of that scent, but it’s about 25% of what it is in the other products, and it isn’t quite so bad cologne. A little more floral? Really, it is much, much better!

  2. monika satyawali
    July 6, 2018 / 4:00 am

    i am facing the same problem and i am definately gonna use this shampoo . thank you for writing such a beautiful and helpful article. i just hope this shampoo works for me too.

  3. Dawn
    July 7, 2018 / 10:23 am

    I’ve used these products for about a year and doubt I’ll ever switch again.

  4. July 9, 2018 / 2:08 pm

    Hi, Christine!

    Thank you for the review. I bleached my hair by myself (and colored them purple), so I’m looking for a shampoo that can restore them and don’t ruin my color. So will it go for colored hair?

    Thank you in advance

    • 15mins
      July 9, 2018 / 9:28 pm

      It should be fine! I color my hair too.

  5. July 9, 2018 / 5:12 pm

    Gosh, this is so helpful, as I have the same problems! Thanks so much!

  6. Suganiya Rajoo
    July 18, 2018 / 4:34 pm

    hello there. are kerastase products safe during pregnancy?

    • 15mins
      July 18, 2018 / 5:00 pm

      You don’t need to worry about hair products with the exception of any treatment products that you’re applying to your scalp

  7. Scar
    September 25, 2018 / 7:04 am

    Does it also straighten ur hair?

    • 15mins
      September 25, 2018 / 8:21 am

      No, it is to help treat the damage

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