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Kerastase Resistance Extentioniste Scalp & Hair Serum | Energizing Leave-In Scalp Serum | Soothing Texture | Stimulate & Protect the Scalp for Healthy Hair | With Ceramides | All Hair Types |1.7 Fl Oz

  • Based on 2,064 reviews
Condition: New
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Availability: Only 5 left in stock, order soon!
Fulfilled by Amazon

Arrives Wednesday, Mar 25
Order within 3 hours and 58 minutes
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Features

  • Extentioniste Scalp Serum: A concentrated hair treatment designed to achieve beautiful lengths in all hair types, especially damaged & sensitized hair.
  • Benefit: Enriched with Ceramides, it repairs fibers from within to improve elasticity, while reducing split ends and the risk of breakage. A key step to reinforce roots and promote a healthy scalp
  • Additional Benefits: Non-greasy formula is perfect to boost and activate the growth of healthy hair to achieve strong long hair with healed surface damage. Additionally purifies and protects scalp
  • Suggested Use: Apply 3 pipettes of serum to scalp once or twice per week. Massage the serum into the root and scalp as you work through each section, then proceed to styling as per your usual routine
  • Resistance Collection: For weakened hair seeking healthy lengths use with Extentioniste Shampoo and Conditioner. Together products will create strengthened hair with reduced breakage and sealed split ends

Is Discontinued By Manufacturer ‏ : ‎ No


Product Dimensions ‏ : ‎ 9 x 6 x 3 inches; 1.76 ounces


Item model number ‏ : ‎ 1


Manufacturer ‏ : ‎ Kerastase


Best Sellers Rank: #44,063 in Beauty & Personal Care (See Top 100 in Beauty & Personal Care) #133 in Hair Styling Serums


#133 in Hair Styling Serums:


Customer Reviews: 4.4 4.4 out of 5 stars (2,156)


Hair Type: Normal


Product Benefits: Enriched with Ceramides, it repairs fibres from within to improve elasticity, while reducing split ends


Item Form: Liquid


Special Ingredients: ceramides


Brand Name: KÉRASTASE


Global Trade Identification Number: 41


Manufacturer: Kerastase


Unit Count: 1.7 Fluid Ounces


Item Weight: 50 Grams


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Mar 25

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
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Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Keeps my hair healthy
Best product I have ever used. Smells divine.
Reviewed in the United States on February 24, 2026 by Alicia Rose

  • It works to grow new hair!!
I’ve been very impressed with the Kerastase Resistance Extentioniste Scalp Serum. It has a clean, fresh scent and doesn’t weigh my hair down or make it feel greasy at all. The most noticeable result for me was new hair growth—I started seeing it in just about three weeks. At first, the new growth looked like little broken hairs on the top of my head, but they continued to grow. Now it actually looks like my hair has long layers, which I love. This serum has become a staple in my routine, and I would definitely repurchase. ... show more
Reviewed in the United States on January 11, 2026 by A. Cardenas

  • best serum!
this has made my hair grow! i’ve only used one bottle so far and it has made a significant difference!
Reviewed in the United States on October 25, 2025 by makayla

  • Great System
Let me start by saying I have the entire line. The serum is not oily but similar in consistency to school glue. It does not weigh my fine hair down at all. Instead, it keeps my frizz controlled and I put it on both wet and dry hair. This stuff is amazing, I just wish the bottle lasted longer!
Reviewed in the United States on July 18, 2024 by BaileyJ

  • Mi opinión personal
The media could not be loaded. Este es uno de los producto que o dudaría en comprar para la caída del pelo ,para mí ha sido uno de los mejores en un mes ya empiezas a ver resultado
Reviewed in the United States on September 9, 2025 by Chica DiAZ Chica DiAZ

  • Small botthe
The bottle is so small. Too expensive for the amount of product. I used the bottle, and I haven't seen any improvement in my hair. Other products show results in less than 2-3 weeks.
Reviewed in the United States on October 2, 2025 by Amazon Customer

  • No venía sellado como se acostumbra a venir
El Serum no venía sellado y sabemos que es un producto caro y tiene un objetivo importante para mí
Reviewed in the United States on February 6, 2026 by Alina Fernandez Alina Fernandez

  • Too expensive
Feels nice on the scalp! Refreshing to the scalp
Reviewed in the United States on July 9, 2025 by Louise

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