• The Cair Strengthening Serum
  • The Cair Strengthening Serum
  • The Cair Strengthening Serum
  • The Cair Strengthening Serum
  • The Cair Strengthening Serum
  • The Cair Strengthening Serum
Hair growth
4.9

The Cair Strengthening Serum

Hyaluronic acid + Caffeine complex + Fermented raspberry extract - 100 ML / 3.4 FL OZ

$112
$112

Payment in 3 instalments available

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Description

The benefits of Cair Fortifying Scalp Serum

Growth. Density. Strength. Volume.

Beautiful hair starts with a healthy scalp. Applied before shampooing, this fortifying hair serum works at the roots, where hair growth begins. Its caffeine complex stimulates and energises regrowth by improving circulation in the scalp. After 28 days of use, hair has greater mass: it is stronger, fuller and appears thicker*.

Scalp care, even for sensitive scalps.

Alcohol-free and rich in prebiotics, it helps maintain a balanced microbiome and rebalance the scalp’s ecosystem. Lactic acid works with phytic acid to gently exfoliate, leaving the scalp healthier and detoxified.

Targeted active ingredients for stronger hair.

Made with 99% ingredients of natural origin, it combines 35% rice water to replenish minerals and restore strength and vitality to the scalp, a caffeine complex to stimulate and improve microcirculation, AHA-rich fermented raspberry extract for shine, and hyaluronic acid for hydration. Free from silicones, artificial colourings, sulphate-based surfactants and inactive ingredients.

Refillable 100 ml / 3.4 fl oz bottle, approximately two months’ use. Yuka score: 72/100 (Good).

*Efficacy test carried out on 22 volunteers with all hair types and sensitive scalps, under dermatological supervision, over 28 days.

How to use
How to use Fortifying Hair Serum ?

To promote the vitality and longevity of your hair, apply before each shampoo. For an intensive one-month treatment, leave on overnight 1 to 2 times a week.

Apply the serum directly to the roots of the hair. Cover the entire scalp using the directional spray, lifting the strands.

Gently massage to create a light emulsion with the sebum to detoxify and enhance the penetration of active ingredients*. Leave on for 10 to 15 minutes or overnight for an intensive treatment. Rinse thoroughly and then proceed with your shampoo
* in the superficial layers of the epidermis.

Key ingredients
99% ingredients of natural origin
35% rice water: hydrates*, remineralizes, restores strength and vitality to the scalp.
Fermented raspberry extract (rich in AHAs): enhances shine, hydration*, and radiance.
Hyaluronic acid: absorbs and retains a significant amount of water, ensuring optimal hydration* levels (even in very dry environments), stimulates cellular cohesion, and maintains skin firmness.
Lactic acid, in synergy with phytic acid: gently exfoliates.
Caffeine complex: stimulates and energizes hair growth, protects hair health, and improves microcirculation.
Prebiome complex: maintains a balanced microbiome to protect against hair loss, ensuring a healthy and lasting bacterial equilibrium. Free from silicone, artificial coloring, sulfate-based surfactants, alcohol, and inert ingredients.
*of the upper layers of the epidermis.

Ingredients list
Oryza Sativa (Rice) Bran Water*, Aqua (Water), Vitis Vinifera (Grape) Fruit Water*, Glycerin, Propanediol, Pentylene Glycol, Phyllostachys Bambusoides Extract, Caffeine, Caprylyl/Capryl Glucoside, Algin, Parfum (Fragrance), Polyglyceryl-10 Isostearate, Sodium Hyaluronate, Citric Acid, Lactic Acid, Sodium Benzoate, Phytic Acid, Tetramethyl Acetyloctahydronaphthalenes, Sodium Hydroxide, Corylus Avellana (Hazelnut) Leaf Extract*, Sarcosine, Lindera Strychnifolia Root Extract, Sodium Dilauramidoglutamide Lysine, Calcium Chloride, Hydroxypropyl Guar, Rubus Idaeus (Raspberry) Fruit Extract, Lactobacillus Ferment Lysate, Hexamethylindanopyran, Potassium Sorbate, Levulinic Acid, Taraxacum Officinale (Dandelion) Leaf Extract, Citronellol, Citrus Limon (Lemon) Peel Oil, Limonene, Geraniol, Hexyl Cinnamal, Pinene

*Ingredients from organic farming

Efficacy
From the very first use, 95%* of women report that their hair feels hydrated, without feeling weighed down. After 28 days of use, volunteers notice increased hair density, greater volume, and hair that appears thicker. 100%* of women also report a healthier, detoxified scalp. Our Fortifying Serum helped the women who tested it achieve stronger, less damaged, and visibly shinier hair.

*Efficacy test conducted on 22 volunteers under dermatological supervision, across all hair types and sensitive scalps, over a period of 28 days.

FEEDBACK / REVIEWS AFTER 28 DAYS OF USE:

“My hair is healthier and in better condition”
“Ready to make this product part of my routine”
“My hair has regained its vitality”

Pro tips
Mask and serum: a complementary routine
You can use these two treatments together, as they address different needs.
Before shampooing, apply the serum to your roots and massage your scalp for greater effectiveness. Apply the mask to your mid-lengths and ends to nourish and repair damaged hair.
Leave on for at least 20 minutes before rinsing.

Delivery and returns
We work with FedEx, and our standard shipping times are 4 to 6 days.

All shipments to the United States now include customs duties and fees. You will therefore not have to pay any customs charges upon delivery: the amount paid at checkout is final and covers all shipping-related costs.

If you purchased a product on our website, you have 14 days from the delivery date to make a return through our dedicated platform (shipping costs are at your expense) or directly in-store. We only accept returns; exchanges are available only for orders placed from mainland France, Luxembourg, and Belgium. Please select the integrated customs clearance option—customs fees are at your expense.

Please note: for hygiene reasons, Cair products unfortunately cannot be exchanged and are only eligible for return. A returned product will only be accepted if it is in its original packaging and unused.
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Overall rating: 4.9397593 / 5 from 83 reviews.

AI Generated Review Summary

The serum is praised for its efficiency and pleasant scent, effectively reducing hair loss and improving hair volume and shine. It also helps maintain a healthy scalp by balancing the microbiome and detoxifying it. The serum is formulated with natural ingredients and is free from harmful chemicals.

Summary topics

  • Efficiency (10%): Customers expressed satisfaction with the remarkable efficiency and pleasant smell of this serum on their fine hair.
  • Scent (10%): Customers expressed satisfaction with the pleasant scent of the product, which was mentioned multiple times in the reviews.
  • Effectiveness (11%): It was reported by customers that the serum is highly effective in reducing hair loss and hair loss.
  • Hair Improvement (33%): Many customers remarked that their hair is coming back, better volume, better shine, and they no longer have itching, dandruff or fungus.

Review topics: ["results","feels","texture","scent","hair","scalp","volume","serum","brush","effect","routine","discovery","use","detangling","cair"].

Review highlights

  • "I use the Cair routine, my hair is silky, clean, and soft, and the rituals are real pleasures." — Maud S.
  • "I recommend The Good Brush and the Cair routine." — Maud S.
  • "I've only been using the serum for a short time but it seems to suit my scalp very well... I notice less hair loss" — Pilar G.

Reviews

Angenehmes Serum

"Das Serum lasst sich leicht anwenden. Es schäumt etwas beim Einreiben. Es riecht gut. Ich lasse es über Nacht wirken. Da ich es bisher nur 3 mal angewendet habe kann ich keine Langzeitwirkung beurteilen."

— Ana E. (5/5)

Un excellent soin pour fortifier les cheveux

"J’aime beaucoup ce sérum ! Il laisse mes cheveux plus doux, brillants et soignés. Sa texture est agréable et il ne laisse pas les cheveux gras. Une belle découverte que je recommande volontiers."

— Méhanya B. (5/5)

Merci 😊😊

"Mon cuir chevelu et mes cheveux vous disent Merci 😊😊"

— Defasque c. (5/5)

Haarserum

"ist zusammen mit der Bürste Nr.4 mein tägliches Pflegeritual"

— Carla S. (5/5)

Refreshing

"This lovely smelling new idea in scalp and hair care is something I am enjoing and may make a difference!"

— Mary H. (5/5)

Bouleversement capillaire 😀

"J'utilise la routine Cair, mes cheveux sont soyeux, propres et doux et les rituels de véritables plaisirs. Je recommande La bonne brosse et la routine Cair."

— Maud S. (5/5)

Bon produit

"Je l’applique la veille au soir ou le matin. Ce n’est pas gras. Mon cuir chevelu n’est plus irrité. Et il sent bon"

— laurence b. (5/5)

Schöne Flaschen mit tollen Inhalt

"Schon nach der ersten Anwendung hatte ich duftige, glänzende Haare und ein gutes Gefühl meiner Kopfhaut."

— Caroline (5/5)

Routine Cair

"La routine est ultra complète, le packaging est très qualitatif et soigné, la sensorialité des produits est dingue (on retrouve l’odeur signature dans tous les soins). C’est simple, depuis que j’utilise les produits Cair (couplés à l’utilisation quotidienne de La Bonne Brosse), je remarque que mes cheveux sont beaucoup plus brillants et semblent en bien meilleure santé. La possibilité de commander des petits formats pour les voyages + les recharges pour ne pas « sur consommer » fait de cette marque un exemple en terme d’éthique. Bravo et merci les filles ✨"

— Jeanne R. (5/5)

Love it!!!! Don’t get tire!!!!

"Enamorada de los productos! Todos! Los amooooooo"

— Niurka O. (5/5)

Q&A