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Rating: 4.2Based on 129 reviews
  • Most helpful positive

    Linda M

    The post was made 4 weeks
    Rating: 5 out of 5

    Saved my hair

    First picture taken: November 18, 2025 Last picture taken today, January 12, 2026. Also using shampoo, conditioner, and mask from the same line. Love it!!!
    703 views

    • ulrika

      The comment was made 3 weeks
      Oh wow, what a difference 🫶
      1 likes

  • Julia

    The post was made 4 days
    Rating: 5 out of 5
    verified customer

    Serum

    Works so well on dry scalp!
    96 views

  • Frida Olsson

    The user's roll: Lyko Creator. The post was made 2 weeks
    Rating: 5 out of 5

    Wow

    Such an insanely good serum for the scalp really. So good really but so expensive unfortunately.
    343 views

  • Sandra

    The post was made 2 months

    Combine with minoxidil?

    Hey! 🌸 This serum really works wonders for the scalp and growth! But I wonder if it's okay to combine it with minoxidil, or if that would be too much?
    1240 views

    • Evelina

      The user's roll: Customer service at Lyko. The comment was made 2 months
      Hey Sandra 😊👋 There is a risk that it might be too much. But if you still want to try, I would suggest applying minoxidil first, letting it dry properly, and then using the Kérastase serum. All the best 🤍

  • Ebba

    The post was made 3 months
    Rating: 5 out of 5

    Love this serum

    A really good serum that I noticed over time made a big difference. I used it when I was losing a lot of hair, and this serum helped a lot. I found that I wasn't losing as much hair when I brushed, for example. Smells really good and you don't need much when applying! Recommend
    2065 views

  • Sofia

    The post was made 4 months
    Rating: 5 out of 5
    verified customer

    Miracle serum!

    This serum has worked miracles for my thin, worn-out, and damaged hair. I've used a dropper every three days since February, and my hair has grown, become much thicker and stronger. A friend of mine recommended this product, and her hair has, with the help of this serum, the same quality as expensive extensions. This serum is worth every penny, the most important thing is to give the product TIME! I would say that you can already notice a difference after 2-3 months.
    2438 views

  • Fanny

    The post was made 4 months
    Rating: 3 out of 5
    verified customer

    Kerastase

    Feels good on the scalp and smells nice, can't see any major difference regarding hair growth
    2379 views

  • Asenat

    The post was made 4 months
    Rating: 4 out of 5
    verified customer

    🔥🔥🔥🔥🔥

    A very good serum that strengthens the scalp and stimulates hair growth. The hair feels healthier and stronger after regular use. Minus for the slightly high price.
    2167 views

  • Ma.iida

    The post was made 4 months
    Rating: 2 out of 5
    verified customer

    No difference

    Felt no difference after using 3 bottles
    2080 views

    • Magda

      The user's roll: Customer service at Lyko. The comment was made 4 months
      Hi Ma.lida, thank you for taking the time to review! 🤗 So typical that you don't notice any difference after using this. I can highly recommend the hair test to get help with products that might help you better 🥰 lyko.com/sv/beauty-scan/hartestet
      1 likes

  • Sümeyye

    The post was made 5 months

    Usage

    Hi I bought this serum and I'm wondering how to use it. I know it says to use it on dry or towel-dried hair, but I'm now wondering can I apply the serum on towel-dried hair and then blow-dry my hair with a hairdryer? Do you get better results when you apply this on damp scalp, so towel-dried? I want my hair to grow fast.
    2919 views

    • Sofia

      The user's roll: Hairdresser at Lyko. The comment was made 5 months
      Hey Sümeyye! 👋🏼 How fun that you got the Extentioniste serum 🥰 It should be applied directly to the scalp, either on dry or towel-dried hair. You can absolutely use it on damp scalp and then blow-dry your hair – it doesn't negatively affect the effect. The important thing is to massage the serum well into the scalp so that it stimulates and strengthens hair growth 🙌🏼 You get the best results if you use it regularly, preferably after every wash. So there’s really not much difference whether you apply it to dry or towel-dried scalp, many find it feels nicer and easier to distribute on damp scalp 🤗 Have a nice day 🏵️
      2 likes

  • Tindra

    The post was made 5 months

    Combine

    Can you combine Kevin Murphy Angel Masque with Kérastase Serum Extentioniste?
    2544 views

KérastaseResistanceSerum Extentioniste scalp serum 50 ml

275 zł
Free shipping, sent from our warehouse in Sweden

A strengthening leave-in serum for damaged hair seeking healthier-looking lengths. Leaves hair revitalised and stronger.

Use:
Apply maximum 3 pipettes of Serum Extentioniste along all the scalp, once or twice a week. Using the tips of the fingers, work the Serum into the scalp, using circular motions.

50 ml
  • Category:Hair Oil

Also available in bundle

Kérastase
Resistance Extentioniste Routine For Weak Hair
635 zł
Without bundle: 709 zł

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