Genesis Serum | Hair Fall Care | Stronger Roots | Kérastase

NEVER BE AFRAID OF FALLING

Genesis Sérum Anti-chute Fortifiant is a daily anti hair-fall fortifying serum for weakened hair, prone to falling. The serum improves resistance to minimize hair fall and maximize beautiful hair. The fiber is stronger*.

Use once daily in the morning or before going to bed during a 6 week period. Apply 4 doses on dry or towel-dried scalp, section by section. 1 dose = 1 pipette until the mark. Do not rinse. In case of contact with eyes, rinse
them immediately and thoroughly. Clinically proven to help reduce the rate of hair fall after 6 weeks**.

MORE FIBER STRENGTH***
RE-ANCHOR FIBER TO THE ROOT


*After the use of Genesis system = Bain Hydra-fortifiant + Fondant Renforçateur + Sérum anti-chute OR Bain Nutri-fortifiant + Masque Reconstituant + Sérum anti-chute.
**Clinical test on 99 people, daily application for 6 weeks.
***instrumental test, after 1 application of Bain Nutri-Fortifiant + Masque + Serum

BENEFITS

 
nourishing
Prevents
Breakage
healthy-hair
Fortifies
Hair
SHINE
Prevents
Hair Fall

 

✔ Helps preserve scalp's natural protective barrier*.
✔ Re-anchor fiber to the root**.
✔ Hair fiber is stronger***.

84% less hair fall due to breakage****

*Clinical instrumental study.
**Clinical study, 99 people, after 6 weeks.
***After the use
of Genesis system = Bain Nutri-fortifiant + Masque Reconstituant + Sérum anti-chute. 
****instrumental test, after 1 application of Bain Nutri-Fortifiant + Masque + Serum

KER_HEROES_2023_BENEFIT_V2_ANTI FALL SERUM

HOW TO USE

Step 1: Apply 4 doses on dry or towel-dried scalp, section by section.
1 dose = 1 pipette until the mark.

Step 2: Do not rinse.

In case of contact with eyes, rinse them immediately and thoroughly.

 

BEFORE/AFTER

Illustration of the contemplated results obtained after applying:



nourishing
healthy-hair
SHINE
1. Bain Hydra-Fortifiant
2. Fondant Renforçateur
3. Défense Thermique

Key Ingredients:


KER_ELIXIR_24_INGREDIENT_DUO_NO_TEXT 1 Aminexil
Re-anchor the fiber to the root.
KER_ELIXIR_24_INGREDIENT_DUO_NO_TEXT Ginger Root Extract
Known for its ability to protect against daily external aggressors.
 KER_ELIXIR_24_INGREDIENT_DUO_NO_TEXT Caffeine
Helps improve scalp micro-circulation thanks to its stimulating properties.

Full Ingredient List

AQUA / WATER / EAU • ALCOHOL DENAT. • DIAMINOPYRIMIDINE OXIDE • AMMONIUM POLYACRYLOYLDIMETHYL TAURATE • AMINOMETHYL PROPANOL • CITRIC ACID • PEG-40 HYDROGENATED CASTOR OIL • PIROCTONE OLAMINE • CAFFEINE • ARGININE • LIMONENE • NIACINAMIDE • PYRIDOXINE HCl • LINALOOL • SAFFLOWER GLUCOSIDE • BENZYL SALICYLATE • COUMARIN • CITRAL • BENZYL ALCOHOL • XYLITYLGLUCOSIDE • CITRONELLOL • BENZYL BENZOATE • ANHYDROXYLITOL • XYLITOL • ZINGIBER OFFICINALE ROOT EXTRACT / GINGER ROOT EXTRACT • RESVERATROL • TOCOPHEROL • SODIUM CITRATE • PARFUM / FRAGRANCE

SCIENCE

 GENESIS  

Dual Anti-Fall Action Haircare

Genesis dual action fortifying system is formulated to strengthen hair and reduce hair breakage.

Enriched with a potent combination of Edelweiss Native Cells and Ginger Root, it strengthens the fiber for intense resilience to reduce the risk of hair fall.

#NeverBeAfraidOfFalling

Dermatologically Tested
Dermatologically
Tested
20% Recycled Glass
20% Recycled
Glass
96% Natural Origin
96% Natural
Origin
Made in Renewable Energy Factory
Made in a factory
using 100%
Renewable Energy*
FSC Certified
FSC
3474636857814_Bain-Hydra-Fortifiant-Shampoo-8

FRAGRANCE

BERGAMOTE DELIZIOSA
Top Notes Heart Notes Base Notes
TOP NOTES: HEART NOTES: BASE NOTES:
LIME, BERGAMOT
ZEST & CEDRAT
ROSE, BERGAMOT
FLOWER & BASIL
VETIVER, MUSK
& TONKA BEAN

 

The Genesis fragrance is an invigorating blend of woody citrus notes. Fresh lime and bergamot zest opens the scent, followed by the soothing aroma of rose, and finally, the grounding depth of vetiver.This captivating combination captures the essence of the outdoors, offering a revitalizing and empowering experience for your hair and senses.

Ratings & Reviews

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  • 51900
  • 4298
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  • 241
  • 176

Average Customer Ratings

Overall 4.5 out of 5 stars

Most Helpful Favorable Review

No Favorable Review Found

Most Helpful Critical Review

No Critical Review Found

Showing 40 out of 2417

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USA

User Type: Consumer

Age: 18 to 24

Gender: Female

- 8/17/2026

Hard to operate

This bottle is very difficult and time consuming. I feel it would be easier as a spray. I also tried using it at different times. What I found is I liked to apply with my conditioner in the shower and let sit for about 5 minutes. When I applied it after the shower or to dry hair it made a weird residue on my hair and made it very difficult to brush and more breakage.- Originally posted on kerastaseusa.com

Yes, I recommend this product

#Product Supplied Free

Helpful ?

USA

User Type: Consumer

Age: 18 to 24

Gender: Female

- 8/17/2026

Big results!

My hair grew alot and was thicker and fuller! I love it the smell the results! It was great. I am so happy my hair feels so smooth and looks so nice and sleek. The day after the wash it still looks amazing.- Originally posted on kerastaseusa.com

Yes, I recommend this product

#Product Supplied Free

Helpful ?

USA

User Type: Consumer

Age: 18 to 24

Gender: Female

- 8/17/2026

So much love for this

This is by far my favorite. The smell and the ease of use is amazing. I love the idea that adding it to your roots to save your hair from falling. I noticed that within a week or so I was not shedding hardly at all compared to how I was before I was using the serum. Definitely recommend the entire genesis kit!- Originally posted on kerastaseusa.com

Yes, I recommend this product

#Product Supplied Free

Helpful ?

USA

User Type: Consumer

Age: 18 to 24

Gender: Female

- 8/17/2026

Great for natural hair!

Great for natural hair and people who love to have they hair out and needs something for less breakage! This makes the roots strong and helps my hair grow faster I love how it makes my hair feel! I notice my hair is less breakage and I'm able to manage it more!!- Originally posted on kerastaseusa.com

Yes, I recommend this product

#Product Supplied Free

Helpful ?

USA

User Type: Consumer

Age: 18 to 24

Gender: Female

- 8/17/2026

Magic

I swear this stuff is magical! I think with using everything including this my hair hasn't looked this beautiful and healthy in the longest time- Originally posted on kerastaseusa.com

Yes, I recommend this product

#Product Supplied Free

Helpful ?

USA

User Type: Consumer

Age: 18 to 24

Gender: Female

- 8/17/2026

My go to serum!! Amazing!

So to give you some perspective I would like to start by saying that my hair has been through a lot. I'm 31 years old and I've had 5 brain surgeries that have ruined my scalp and I also have dandruff. This serum has become a staple for me along with other Kerastase products. However this serum is everything. Not only is it affordable but it works wonders to protect and nourish my scalp by using key ingredients such as Aminexil Edelweiss Native Cells and Ginger Root. My head is no longer itchy! I was expecting it to help with my hair loss but I didn't realize that it would make my scalp stop itching. I used to use head and shoulders at the scalp and then use biotene on the shaft and length of my hair. Now I use all Kerastase products. And instead of having to use head and shoulders at the scalp I only need this serum and the I use their amazing line of Genesis shampoo conditioner serum and blow dry primer. So before using Kerastase my hair and scalp were suffering. After all of the scalp trauma from multiple surgeries and aging my hair was so damaged dry frizzy itchy FALLING OUT in a major way! This serum is very easy to apply and even has a line on the glass dropper to let you know how much product to use. Which is so helpful to keep from waste. My hair definitely needed these products there is a night and day difference in the overall health of my hair and scalp. My scalp is no longer itchy its helped greatly to keep my scalp nourished and hydrated. I no longer have handfulls of fallout when brushing and taking a shower. It has minimized my hair loss from handfulls to what it used to be which was just a few hairs in the brush and shower. I'm no longer shedding like a cat in the summer. My hair feels much thicker shiny frizz free and healthy.I would definitely recommend this product to anyone. Not just people who have the same afflictions as me but those looking to have beautiful healthy hair!- Originally posted on kerastaseusa.com

Yes, I recommend this product

#Product Supplied Free

Helpful ?

USA

User Type: Consumer

Age: 18 to 24

Gender: Female

- 8/17/2026

Not good

Couldn't tell what each product was because of the different language.- Originally posted on kerastaseusa.com

No, I not recommend this product

#Product Supplied Free

Helpful ?

USA

User Type: Consumer

Age: 18 to 24

Gender: Female

- 8/17/2026

Kshah

It was okay! Didn't really make my hair feel good! It made my hair feel dry and brittle!- Originally posted on kerastaseusa.com

No, I not recommend this product

#Product Supplied Free

Helpful ?

USA

User Type: Consumer

Age: 18 to 24

Gender: Female

- 8/17/2026

Not what claims is

Says was serum i thought anti frizz serum but it was like watery perfume suplo8to put on my roots did nothing for my hair- Originally posted on kerastaseusa.com

No, I not recommend this product

#Product Supplied Free

Helpful ?

USA

User Type: Consumer

Age: 18 to 24

Gender: Female

- 8/17/2026

Loved this!

This was a really nice serum for my hair type. I used it after diffusing my curls and it really tamed my fly always all day. I just wish the smell was more subtle.- Originally posted on kerastaseusa.com

Yes, I recommend this product

#Product Supplied Free

Helpful ?

USA

User Type: Consumer

Age: 18 to 24

Gender: Female

- 8/17/2026

Not good

Couldn't tell what each product was because of the different language.- Originally posted on kerastaseusa.com

No, I not recommend this product

#Product Supplied Free

Helpful ?

USA

User Type: Consumer

Age: 18 to 24

Gender: Female

- 8/17/2026

Kshah

It was okay! Didn't really make my hair feel good! It made my hair feel dry and brittle!- Originally posted on kerastaseusa.com

No, I not recommend this product

#Product Supplied Free

Helpful ?

USA

User Type: Consumer

Age: 18 to 24

Gender: Female

- 8/17/2026

Not what claims is

Says was serum i thought anti frizz serum but it was like watery perfume suplo8to put on my roots did nothing for my hair- Originally posted on kerastaseusa.com

No, I not recommend this product

#Product Supplied Free

Helpful ?

USA

User Type: Consumer

Age: 18 to 24

Gender: Female

- 8/17/2026

Loved this!

This was a really nice serum for my hair type. I used it after diffusing my curls and it really tamed my fly always all day. I just wish the smell was more subtle.- Originally posted on kerastaseusa.com

Yes, I recommend this product

#Product Supplied Free

Helpful ?

USA

User Type: Consumer

Age: 45 to 54

Gender: Female

- 8/17/2026

New Genesis

This product is amazing and the smell is awesome!!- Originally posted on kerastaseusa.com

Yes, I recommend this product

Helpful ?

USA

User Type: Consumer

Age: 45 to 54

Gender: Female

- 8/17/2026

New Genesis

This product is amazing and the smell is awesome!!- Originally posted on kerastaseusa.com

Yes, I recommend this product

Helpful ?

USA

User Type: Consumer

Age: 18 to 24

Gender: Female

- 8/17/2026

This serum WORKS

I'm blown away by this product. Love the scent of the whole line—very gender neutral and clean. This scalp serum at first felt like it would be a chore to add into my routine but it quickly became my favorite morning ritual. I divide my hair in 4 sections and the measured dropper is much easier to use than I'd worried it would be. I drop small drops all throughout the section onto my scalp and once applied I massage it in for 5 or so minutes and it is so relaxing. The scalp serum feels invigorating without feeling tingly. My scalp is so moisturized and healthy looking even during a cold winter. Even on days where I didn't wash my hair the serum didn't give my scalp build up or residue. The serum sinks in quickly but it will drip some if you don't move somewhat swiftly. This serum has changed my hair so much i had to go to the salon sooner than normal for a trim because my scalp was hanging on to so much new growth. I'm shocked that a product like this actually lived up to its claim. My hair is thicker and healthier and I'm proud to wear it down and worry less about thin spots showing through. Thank you Kerastase!- Originally posted on kerastaseusa.com

Yes, I recommend this product

#Product Supplied Free

Helpful ?

USA

User Type: Consumer

Age: 55 to 64

Gender: Female

- 8/17/2026

Stronger already?

I haven't used this product long enough to determine whether it's helping my hair but I'm in love with the scent. Only used for a week but my hair feels stronger and it leaves my hair soft and smelling awesome!- Originally posted on kerastaseusa.com

Yes, I recommend this product

Helpful ?

USA

User Type: Consumer

Age: 35 to 44

Gender: Female

- 8/17/2026

Smells great!

The smell is great not overbearing and this product did not leave much hair oily.- Originally posted on kerastaseusa.com

Yes, I recommend this product

Helpful ?

USA

User Type: Consumer

Age: 45 to 54

Gender: Female

- 8/17/2026

Love this serum!

Really love this! The smell is so fresh & clean. Gives my roots volume & no stickiness. Very impressed!- Originally posted on kerastaseusa.com

Yes, I recommend this product

Helpful ?

USA

User Type: Consumer

Age: 45 to 54

Gender: Female

- 8/17/2026

fantastic

I have chemically belached severly damaged hait that's a bit longer than shoulder length. I've been using the Genesis line products for a little over a week and I've had less than 10 hairs in my styling brush and almost no hair fallout in the shower. My hair is shinier healthier looking easier to style and not breaking when I dry and smooth it with a round brush.- Originally posted on kerastaseusa.com

Yes, I recommend this product

Helpful ?

USA

User Type: Consumer

Age: 18 to 24

Gender: Female

- 8/17/2026

Works well but haven't used it enough times so far

Good product although I haven't been consistant enough in my use with that one as it requires a routine.- Originally posted on kerastaseusa.com

Yes, I recommend this product

Helpful ?

USA

User Type: Consumer

Age: 35 to 44

Gender: Female

- 8/17/2026

Nice product

I like it the smell is terrific. Hair definitely seems stronger.- Originally posted on kerastaseusa.com

Yes, I recommend this product

Helpful ?

USA

User Type: Consumer

Age: 18 to 24

Gender: Female

- 8/17/2026

Primer Love

I love love love this primer!!! Highly recommended- Originally posted on kerastaseusa.com

Yes, I recommend this product

#Product Supplied Free

Helpful ?

USA

User Type: Consumer

Age: 18 to 24

Gender: Female

- 8/17/2026

My hair is glowing!

So about a year ago I was going through something and I chopped my hair off like just chop chop in my bathroom. I immediately regretted it. A whole year later my hair would not grow!!!!!!you really could not tell a difference in length! And in just the time that I started to use this hair care line I have been able to see so much growth! I don't know how much hair a person can grow in the span of two months but wow! I don't know if applying this serum to my roots helped something but oh my goodness I saw a difference! The only complaint was that the serum at times made my hair a little oily. But that could've been my fault. Maybe I went too crazy with the product! Ha! But other than that I loved the whole line and can't wait to get my hands on more!!!!- Originally posted on kerastaseusa.com

Yes, I recommend this product

#Product Supplied Free

Helpful ?

USA

User Type: Consumer

Age: 18 to 24

Gender: Female

- 8/17/2026

Great everyday product

Have been using this everyday for a month now and can really tell the difference it makes in keeping my hair healthy shiny and giving it the texture it needs all day- Originally posted on kerastaseusa.com

Yes, I recommend this product

#Product Supplied Free

Helpful ?

USA

User Type: Consumer

Age: 18 to 24

Gender: Female

- 8/17/2026

Love it!

So I was super nervous about using a serum everyday especially putting it on my roots because I wash my hair every 3 days or so and I was worried that this would leave my hair looking or feeling greasy but it absolutely didn't! I love it so much! I feel like my hair looks so much healthier and it smells AMAZING.- Originally posted on kerastaseusa.com

Yes, I recommend this product

#Product Supplied Free

Helpful ?

USA

User Type: Consumer

Age: 18 to 24

Gender: Female

- 8/17/2026

Works well but haven't used it enough times so far

Good product although I haven't been consistant enough in my use with that one as it requires a routine.- Originally posted on kerastaseusa.com

Yes, I recommend this product

Helpful ?

USA

User Type: Consumer

Age: 55 to 64

Gender: Female

- 8/17/2026

Saved my hair!

This product has added strength and shine to my hair. It has improved the texture and reduced breakage. I use it with the Genesis shampoo and conditioner and together they have saved my hair!- Originally posted on kerastaseusa.com

Yes, I recommend this product

Helpful ?

USA

User Type: Consumer

Age: 55 to 64

Gender: Female

- 8/17/2026

Genesis hair serum-awwwsome!

Great productCould tell hair was slightly thicker after a week!- Originally posted on kerastaseusa.com

Yes, I recommend this product

Helpful ?

USA

User Type: Consumer

Age: 18 to 24

Gender: Female

- 8/17/2026

The best fortifier

Absolutely love this product. My hair definitely feels stronger and I am noticing less shedding. The top and front sides have been thinning and now I am seeing new hair growth.- Originally posted on kerastaseusa.com

Yes, I recommend this product

Helpful ?

USA

User Type: Consumer

Age: 45 to 54

Gender: Female

- 8/17/2026

Serum

Grear product. Controls fly aways for my fine hair. The smell is amazing. Love this stuff!- Originally posted on kerastaseusa.com

Yes, I recommend this product

Helpful ?

USA

User Type: Consumer

Age: 35 to 44

Gender: Female

- 8/17/2026

Great if you're willing to sacrifice softness

I've been using the shampoo and conditioner of this line for a while now. Recently I purchased the serum. I can say with confidence that this product does what it promises. My hair is sooo much stronger and thicker. I brush and blow dry my hair and there's barely any hairs falling. Softness is an issue though... hair feels rougher and not smooth. It kind of reminds of how the olaplex step 1 and 2 feels on my hair. I don't mind though because I prefer strong hair than weak and soft but if they could add something to this formula so that the hair would be soft then it would have been a miracle product!- Originally posted on kerastaseusa.com

Yes, I recommend this product

Helpful ?

USA

User Type: Consumer

Age: 45 to 54

Gender: Female

- 8/17/2026

Greasy

This said to use 4 doses which left my hair very greasy. I decreased it to 1 dose which was better but I'm sending the whole line back - I feel it made my hair more damaged.- Originally posted on kerastaseusa.com

No, I not recommend this product

Helpful ?

USA

User Type: Consumer

Age: 18 to 24

Gender: Female

- 8/17/2026

Not as expected

Leaves my hair rough and unpleasant.The texture of the hair becomes like it's been coated. Disappointing.- Originally posted on kerastaseusa.com

No, I not recommend this product

Helpful ?

USA

User Type: Consumer

Age: 18 to 24

Gender: Female

- 8/17/2026

Not great

did not love this product- could not tell very much difference after using for 2 weeks- Originally posted on kerastaseusa.com

Yes, I recommend this product

Helpful ?

USA

User Type: Consumer

Age: 35 to 44

Gender: Female

- 8/17/2026

A Yes from Me So Far!

So far so good- i am loving the entire Genesis line. I was expecting this serum to be thick and I was very surprised that it's thin as water! It doesn't make my hair seem greasy or heavy and it smells fantastic! Can't wait to see the results!- Originally posted on kerastaseusa.com

Yes, I recommend this product

Helpful ?

USA

User Type: Consumer

Age: 45 to 54

Gender: Female

- 8/17/2026

Best Product!

It works! I noticed a difference after 4 days of use. It is worth every penny!- Originally posted on kerastaseusa.com

Yes, I recommend this product

Helpful ?

USA

User Type: Consumer

Age: 45 to 54

Gender: Female

- 8/17/2026

Miracle Serum

I have used this serum for a week now and my hair is so much healthier. It is stronger and smoother.- Originally posted on kerastaseusa.com

Yes, I recommend this product

Helpful ?

USA

User Type: Consumer

Age: 55 to 64

Gender: Female

- 8/17/2026

Serum Fortifant Hair Serum

This product spreads throughly because of the watery consistency. It smells yummy & is essential for the scalp & hair. It's my new go to!- Originally posted on kerastaseusa.com

Yes, I recommend this product

Helpful ?

Frequently Asked Questions

1. What are the benefits of Fondant Renforcateur? How to use it?

Its action reinforces fiber natural resistance to reduce the risk of hair-fall due to breakage. It provides immediate strength and softness without weighing down the hair. Apply to shampooed, towel-dried hair. Leave on for 2 to 3 minutes. Rinse thoroughly.

2. Can Masque Reconstituant & Fondant Renforcateur be applied on the scalp?

Those 2 products take care of hair lengths. They provide hair with intense moisture and reinforcement in order to fight against hair-fall from breakage due to repeated processing like brushing . We do not recommend to apply them on the scalp.

3. Are Genesis products free of sulfates, parabens and silicones?

Bain Hydra-Fortifiant / Fondant Renforcateur / Serum Anti-Chute Fortifiant/Ampoules Cure Anti-Chute Fortifiantes / Concentré Ampli-force / Poudre Détox are free of silicons. Except Bain Hydra-Fortifiant and Bain Nutri-Fortifiant, all Genesis formulas are free of sulfates and paraben.

4. What are the benefits of the Masque Reconstituant? How to use it?

Its action intensely nourishes, detangles and reinforces the hair to reduce the risk of hair-fall due to breakage. It restores intense softness for beautiful healthy looking hair. Apply to shampooed, towel-dried hair. Massage the lengths and ends. Leave on for 5 minutes. Rinse thoroughly. In case of contact with eyes, rinse them immediately.

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