--- product_id: 70575721 title: "Kerastase Resistance Extentioniste Serum – Strengthening, 1.7 Fl Oz" brand: "kérastase" price: "¥145" currency: JPY in_stock: false reviews_count: 13 url: https://www.desertcart.jp/products/70575721-kerastase-resistance-extentioniste-serum-strengthening-1-7-fl-oz store_origin: JP region: Japan --- # Stimulates scalp for healthy growth 1.7 fl oz concentrated serum Ceramide-enriched fiber repair Kerastase Resistance Extentioniste Serum – Strengthening, 1.7 Fl Oz **Brand:** kérastase **Price:** ¥145 **Availability:** ❌ Out of Stock ## Summary > 🌿 Unlock your hair’s full potential—because your scalp deserves the VIP treatment. ## Quick Answers - **What is this?** Kerastase Resistance Extentioniste Serum – Strengthening, 1.7 Fl Oz by kérastase - **How much does it cost?** ¥145 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/70575721-kerastase-resistance-extentioniste-serum-strengthening-1-7-fl-oz) ## Best For - kérastase enthusiasts ## Why This Product - Trusted kérastase brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Scalp-First Approach:** Purifies and soothes the scalp to create the ideal environment for strong, healthy hair growth. - • **Synergize Your Routine:** Maximize results by pairing with Extentioniste Shampoo and Conditioner for visibly longer, fortified hair. - • **Lightweight & Non-Greasy:** Energizing leave-in serum absorbs quickly without weighing hair down—perfect for busy professionals. - • **Strengthen from Root to Tip:** Ceramide-infused formula repairs and boosts hair elasticity, reducing breakage and split ends. - • **Universal Hair Compatibility:** Formulated for all hair types, especially damaged and sensitized strands craving resilience. ## Overview Kerastase Resistance Extentioniste Scalp & Hair Serum is a 1.7 fl oz leave-in treatment enriched with ceramides that repairs hair fibers, improves elasticity, and reduces split ends. Designed for all hair types, it purifies and soothes the scalp while stimulating healthy hair growth. Ideal for damaged or sensitized hair, this lightweight serum works best when combined with the Extentioniste shampoo and conditioner for stronger, longer hair. ## Description Rebuild weak and damaged hair lengths while restoring the hair fiber. Resistance strengthens the hair to help repair the effects of heat styling and prevent hair breakage in over-processed hair Expert Formulas Creatine R: Reinforce hair fiber structure Ceramides: Strengthen hair, add shine & moisture Fusio-Dose Instant Transformation, Infinite Possibilities. In-Salon Service Make an appointment in your Kérastase salon for a personalized hair diagnosis. Supports healthy hair lengths Protects hair fiber from external aggressors Stimulates scalp Supports healthy hair lengths Easily detangles hair Seals split ends Strengthen & supports healthy hair lengths Easily detangles hair Seals split ends Less hair breakage from blow drying Supports healthy hair lengths & seals split ends Heat protectant with 450°F thermo-protection Supports healthy hair lengths Soothing texture for itchy scalp Essential nutrition for healthy hair What is the difference between Resistance Force Architecte, Extensioniste, and Therapiste? The main difference between these ranges is the level and type of hair damage. Resistance Extentioniste is ideal for slow growing, damaged hair lengths What is the key ingredient in the Resistance Extentioniste range? The key ingredient is Creatine R, an exclusive complex composed of Creatine an amino acid that reinforces the internal structure of the hair fiber. Is this product safe for color-treated hair? Yes, this product is safe for color-treated hair Extentioniste Shampoo Extentioniste Conditioner Extentioniste Mask Extentioniste Thermique Extentioniste Serum is a leading global luxury professional haircare brand. Born in Paris in 1964, the brand has built its reputation on delivering on scalp and hair through exquisite products and personalized, in-salon treatments, all powered by . Kérastase adopts a to care for and all individuals, as well as the world we live in. ## 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 ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B07D58FSWY | | Best Sellers Rank | #659 in Hair Styling Serums | | Item Model Number | 3474636636341 | | Manufacturer | Kerastase | | Product Dimensions | 9 x 6 x 3 inches; 1.76 ounces | ## Product Details - **Brand:** KÉRASTASE - **Hair Type:** Normal - **Item Form:** Liquid - **Item Weight:** 50 g ## Images ![Kerastase Resistance Extentioniste Serum – Strengthening, 1.7 Fl Oz - Image 1](https://m.media-amazon.com/images/I/51HA-lfBKzL.jpg) ![Kerastase Resistance Extentioniste Serum – Strengthening, 1.7 Fl Oz - Image 2](https://m.media-amazon.com/images/I/61qHifvfF1L.jpg) ![Kerastase Resistance Extentioniste Serum – Strengthening, 1.7 Fl Oz - Image 3](https://m.media-amazon.com/images/I/7103UobWQQL.jpg) ![Kerastase Resistance Extentioniste Serum – Strengthening, 1.7 Fl Oz - Image 4](https://m.media-amazon.com/images/I/816-LVdOYJL.jpg) ![Kerastase Resistance Extentioniste Serum – Strengthening, 1.7 Fl Oz - Image 5](https://m.media-amazon.com/images/I/71G+QDvBxNL.jpg) ## Questions & Answers **Q: What is the difference between Resistance Force Architecte, Extensioniste, and Therapiste?** A: The main difference between these ranges is the level and type of hair damage. Resistance Extentioniste is ideal for slow growing, damaged hair lengths **Q: What is the key ingredient in the Resistance Extentioniste range?** A: The key ingredient is Creatine R, an exclusive complex composed of Creatine an amino acid that reinforces the internal structure of the hair fiber. **Q: Is this product safe for color-treated hair?** A: Yes, this product is safe for color-treated hair ## Customer Reviews ### ⭐⭐⭐⭐⭐ Love it. *by on Reviewed in the United States July 24, 2026* Great for my hair. ### ⭐⭐⭐⭐⭐ It works to grow new hair!! *by on Reviewed in the United States January 11, 2026* 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. ### ⭐⭐⭐⭐⭐ Kerastase Serum *by on Reviewed in the United States March 16, 2026* Wonderful serum to use once a week. Serum is light and has a pleasant scent. I love the Kerastase product line ## Frequently Bought Together - Kérastase Resistance, Conditioning Leave-In Scalp & Hair Serum, For Long Hair, With Ceramides, Sérum Extentioniste, 50ml - Kerastase Elixir Ultime L'Huile Original Hair Oil For All Hair Types - Hydrates, Strengthens and Adds Shine With Heat Protection and Frizz Control, With Wild Camellia --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.jp/products/70575721-kerastase-resistance-extentioniste-serum-strengthening-1-7-fl-oz](https://www.desertcart.jp/products/70575721-kerastase-resistance-extentioniste-serum-strengthening-1-7-fl-oz) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-10-14*