Keratin AA, Peptides & Hyaluronic Acid Hair Serum
Hair strengthening
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Keratin AA, Peptides & Hyaluronic Acid Hair Serum
50 ml

Made in France

Dermatologically Tested

Pregnant Woman

Vegan
Why we love it
Restores and strengthens the hair fibre: this leave-in serum works on both the inside and outside of the hair by restoring the links between the keratin chains. Hair is repaired right down to the ends. Hair is stronger, more resistant, less brittle, softer and shinier.
Its formula combines active ingredients with 'bond repair' technology
Hair types
This serum is dedicated to all hair types and textures for daily care, but also for damaged hair, particularly hair weakened by chemical treatments, salt, UV rays and heat.
How do I use it?
Apply a few drops to your dry or damp hair, right through to the ends. Use as a daily treatment, without rinsing.
Marie Claire Beauty Excellence Award
Aroma-Zone was awarded the Marie Claire 2026 Prix d'Excellence de la Beauté in the Innovation category.
Deep restorative effects
Hair is genuinely repaired from the inside out, thanks to a complex of active ingredients that start working at the heart of the hair fibre to restore the bonds between keratin chains. The hair fibre is strengthened and restored, for stronger, more resistant, healthier hair.
On the outside: the complex of active ingredients seals the scales, sheathes the hair fibre and prevents the appearance of split ends.
Hair is immediately, lastingly and deeply moisturised thanks to hyaluronic acid.
Result: an overall improvement in the appearance of the hair
Your hair is restored right down to the tips, split ends are reduced and each strand of hair is sheathed.
Hair is shinier, glossier, softer and silkier.
All hair types are improved.
Ideal for looking after long hair.
Bonus
With its light, non-greasy texture, this leave-in serum makes styling easier, reduces frizz and tames hair without weighing it down.
A tried-and-tested formula
Its formula is free from silicone or controversial ingredients, in line with our formulation charter, which is more stringent than European cosmetics regulations.
+80% : restorative effects after just one application***
+171% : restorative effects after 28 applications ****
72% : softness**
+47% : shine**
90% : prevents the appearance of split ends*
90% : stronger, more durable hair *
95% : reduces frizz*
95% : softer, silkier hair*

* % satisfied with the criteria mentioned, laboratory test carried out under dermatological control on 20 volunteers over 28 days.
** Self-scoring by 20 volunteers after 28 days of use.
*** Instrumental measurement carried out on 10 strands of damaged hair after 1 application of Keratin AA, Peptides and AH Hair Serum.
**** Instrumental measurement carried out on 10 strands of damaged hair after 28 applications of Keratin AA, Peptides and AH Hair Serum.
Microscopic photo of untreated and treated hair (after 28 days' use of our Keratin AA, Peptides and AH Hair Serum).


It is ideal for dry, oily, fine, thick, straight, wavy, curly and frizzy hair, including bleached and coloured hair. It is also suitable for grey and white hair.
Apply a few drops of serum to your dry or damp hair, right down to the ends, as a daily leave-in treatment.
Style with a comb or your fingers.
TIP: depending on your hair's needs, you can combine this serum with the Strengthening & Densifying Hair Serum
In what order should I apply the products in my hair routine?
Step 1
Start by washing your hair with our Palm Oil-Free Neutral Shampoo Base or a Strength & Shine Shampoo Bar.
Step 2
Then apply a Volume & Shine Conditioner Bar and/or the Neutral Hair Mask. Leave on, then rinse.
Step 3
Apply Keratin AA, Peptides and AH Hair Serum to your dry or towel-dried hair right down to the ends.

Step 4
If your hair is textured, apply a leave-in hair cream and/or our Curl-Defining Gel with Hyaluronic Acid & Flaxseed.
What is the difference between the Keratin AA & Peptides Hair Serum, the Peptides & Pea Extract Hair Serum and the Hyaluronic Acid Serum?

Keratin AA & Peptides Hair Serum
Repairs damaged hair from within
Protects the hair fiber
Works on lengths and ends

Peptides & Pea Extract Hair Serum
Stimulates hair growth
Helps slow down hair loss
Works directly on the scalp

Hyaluronic Acid Serum
Hydrates
Softens
Acts on lengths and ends
Combination of ingredients: This formula combines an itaconic acid* complex with biomimetic keratin peptides to reconnect and restore disulphide bridges and keratin chains, strengthening the hair fibre from within. Vegan Keratin AA further fortifies the fibre, smoothing and sealing the cuticles to coat the hair for a shinier, glossier finish. Hyaluronic acid completes the blend with its deeply moisturising and protective benefits.
Key ingredients
Keratin AA: 100% natural, vegan amino acids that mimic the keratin found in hair, offering a perfect alternative to animal-derived keratin. They penetrate the hair fibre to strengthen, hydrate, and prevent breakage, while smoothing the cuticles to enhance shine and luminosity.
Sh-oligopeptide-78: a biomimetic peptide of Keratin II composed of 13 amino acids. It penetrates the hair cortex to restore integrity from within, reconnecting disulphide bridges and keratin chains. The result: stronger, shinier, more elastic hair that regains its natural vitality.
Itaconic acid* and arginine complex : binds to damaged keratin fibres to create new disulphide bridges, reinforcing the hair fibre from the inside out. It reduces porosity, improves hydrophobicity (water repellency), and increases resistance to humidity.
Hyaluronic acid : 100% natural and produced through wheat fermentation. A powerful moisturising active, it helps maintain optimal hydration, improving suppleness and protecting the hair fibre.
* Patent pending by our supplier - US20240074957A1 (United States).
INGREDIENTS: Aqua (water), Pentylene Glycol (natural emollient), Aspergillus Ferment (active ingredient with a high dose of itaconic acid*), Salix Nigra Bark Extract (black willow bark extract), Glycerine (organic plant-based glycerine), Arginine (amino acid), Keratin Amino Acids (vegan keratin amino acids), Sodium Hyaluronate (hyaluronic acid), sh-oligopeptide-78 (biomimetic keratin peptide), Sodium Hydroxide (pH adjusters).
Storage
The shelf life of the product is 9 months. Store this bottle away from heat and light.
Precautions
Avoid contact with eyes. In case of contact, rinse with plenty of clean water.
The shaft consists of 3 layers:
The cuticle: the cuticle is the name given to the outer layer of the hair. It is made up of flat, scale-like cells that overlap to form a protective covering for the hair shaft. A healthy cuticle has sealed scales and is smooth to the touch. It is the cuticle that gives hair its shine. It also helps lock optimal moisture into the hair.
The cortex: this is the intermediate layer and main component of the hair shaft. The cortex contains long cells made up of helical chains of keratin. These chains are joined by thousands of bonds called 'disulphide bridges'. These capillary connections between keratin fibres give hair its texture, suppleness and strength. It is also in the cortex that the melanin pigments responsible for hair colour are found.
The medulla: at the core of the hair we find the medulla. There is keratin here in the form of loosely packed cells forming an amorphous, soft, greasy substance. The medulla contains amino acids and sugars, such as glycogen.
The above communication is a summary compiled by our experts on the basis of currently available scientific data. It is provided for information purposes only.
In partnership with 24 founding brands, Aroma-Zone is committed to assessing the environmental and societal impact of your products based on more than 50 criteria, using a methodology developed by Afnor Normalisation*.
*Afnor Spec 2215

Environmental and social impact
Packaging impact
Reusable packaging.Mostly recyclable packaging.
Impact of manufacturing
Impact of transport
Low COâ‚‚ impact from the transport of raw materials.
Consumer use
This product is designed to reduce its environmental impact during use.
Social impact
Product manufactured and packaged in a French facility complying with strict social standards. Product containing no ingredients or derivatives of animal origin.Aroma-Zone is a Mission-Driven Company.
Green Impact Index
The Green Impact Index is a tool for displaying the environmental and societal impact of cosmetic products, food supplements, and family well-being and health products. It is based on the methodology described in AFNOR Spec 2215. Developed in collaboration by 21 companies, associations, and federations, it evaluates your products on over 50 criteria for greater transparency! [Learn more]
Environmental qualities and characteristics product sheet
Reference
0493401 - Keratin AA, Peptides and AH Hair Serum 50 mL
Main packaging material
Glass bottle
Recyclability
Most of the packaging for this product can be recycled.
Aroma-Zone – Recycling instructions
Frequently Asked Questions
This serum has been developed for all types of damaged hair.
Use this serum every day.
There's no need to shampoo before applying this serum.
This treatment can be used on wet or dry hair. Make sure the product is evenly distributed throughout the hair.
This serum is suitable for pregnant and breast-feeding women.
This might be a good product, but on my very frizzy hair, I don't see a difference when I apply it. My hair is neither softer nor shinier. I will not be repurchasing.
Really great, for super soft hair
Excellent, effective, gentle, with no irritation whatsoever.
Same answer as above!
Very satisfied
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