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RESISTANCE EXTENTIONISTE Serum by Kérastase is a highly concentrated treatment that stimulates the strength and health of hair follicles, thus promoting the growth of long, resistant hair.
This serum acts as an energizer and reinforcer at the roots, promoting a healthy environment of the scalp, to ensure healthy and vigorous hair growth. In addition, its formula, enriched with ceramides and plant extracts, protects the scalp from external aggressions to which it is subjected daily.
Suitable for all types of hair, this serum activates hair growth to keep it healthy and longer.
How to use:
Apply 3 pipettes of the Serum Extentioniste on the key areas of the scalp, at least twice a week.
Carry out a light massage on the scalp, to accompany the application, with the fingertips.
Translated by Google
Recommendations:
This serum can be used by all hair types.
For complete efficacy, we recommend using complementary products from the same treatment line.
What benefits does Kerastase Resistance Extentioniste Serum offer?
Translated by Google
-28/07/2026
A high-performance hair concentrate focused on stimulating and strengthening hair: • It exerts a repairing action that seals the ends and protects the fiber against mechanical stress. • It provides nourishing and hydro-regulating properties that improve the overall flexibility of the hair. • It provides stronger, silkier hair with exceptional shine and luster.
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What is the manual friction guideline and the thorough absorption time on the scalp?
Translated by Google
-27/07/2026
Apply directly to the clean scalp, massaging in a circular motion with your fingertips without rinsing.
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For which types of long, weakened hair or hair prone to breakage is this noble development prescribed?
Translated by Google
-04/05/2026
It is prescribed for hair that seeks to maximize its length without suffering structural damage or brittle ends.
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How does this technically demanding hair serum act on the hair follicle and fiber?
Translated by Google
-16/01/2026
It stimulates the scalp and strengthens the lengths through specific agents that optimize resistance to breakage.
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The same one that Leticia did! And I already saw the answer. Could it be that Kérastase does not have a Serum or other product to thicken and / or volumize the hair? Thanks!
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Diana30/07/2021
Good morning Diana, Thank you for writing us. This Kérastase product is intended to strengthen hair. In the case of requiring products to give volume to the hair, you have the Densifique line of this same brand and the Volumifique shampoo also destined to add volume to fine hair. If you have any further questions, do not hesitate to contact us. Greetings from the Perfume’s Club team.
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Does it help hair growth?
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Sofía16/08/2020
Hello Sofia! This product effectively helps to activate hair growth by activating the hair follicle. This will help you to keep it longer. All the best!
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In addition to growth, does it also serve to give hair thickness or volume?
Translated by Google
Leticia11/08/2020
Hello Leticia, thank you for your inquiry. No, it is specially formulated to provide strength and greater resistance to the hair from its birth at the root. All the best
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