Kerastase Genesis Hair Serum | Daily Strengthening Treatment for Weak or Damaged Hair | Nourishes and Reinforces Hair | Anti-Breakage | Silicone-Free | For Weakened Hair | Serum Fortifiant
$33.00
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Product description
Fortify Hair Prone To Falling
Genesis
Our hair care collection that treats hair fall due to hair breakage from brushing. The Genesis collection is a dual action fortifying system professionally formulated to strengthen hair and reduce hair breakage.
Expert Formulas
Powered by Edelweiss Native Cells and Ginger Root
Edelweiss Native Cells & Ginger Root: Detangle, moisturize, and increase strength and softness. 
Fusio-Dose
Professional In-Salon Treatment
Instant Transformation, Infinite Possibilities.
In-Salon Service
Your appointment
Make an appointment in your Kérastase salon for a personalized hair diagnosis.
1 Ingredients
2 Fusio-Dose
3 Diagnosis
Discover Genesis
Nutri-Fortifiant Shampoo
Gently Cleanses Scalp and HairIntensely Moisturizes and Easily DetanglesStrengthens Hair Weakened by Heat Damage and Brushing
Hydra-Fortifiant Shampoo
Gently Cleanses Scalp and Hair to Remove Excess BuildupStrengthens Hair Weakened by Heat Damage and BrushingNourishes and Easily Detangles Hair
Renforcateur Conditioner
Intensely Moisturizes and Adds BodyStrengthens Hair Weakened by Heat Damage and BrushingEasily Detangles and Prevents Split Ends
Reconstituant Hair Mask
Intensely Nourishes and Hydrates HairStrengthens Hair Weakened by Heat Damage and BrushingSmooths and Easily Detangles
Defense Thermique Hair Serum
Protects Against Heat StylingDelivers Up to 24 Hours of Frizz ProtectionStrengthens Hair Weakened from Brushing and Over-Styling
Fortifiant Hair Serum
Strengthens Hair Weakened by Heat and BrushingHydrates Hair and Adds ShineHas a Lightweight, Non-Greasy Finish
Will this make my roots greasy?
The Serum Fortifiant is a silicone-free, lightweight formula designed to absorb quickly into the scalp without leaving residue or oiliness.
How much should I use per application?
Fill the pipette to the black dosage line. This equals one dose. We recommend using 4 doses to cover the entire scalp.
Can I use this on dry hair?
Yes, the serum can be applied to both towel-dried hair after washing or dry hair on non-wash days.
Explore the Genesis Collection
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Customer Reviews
4.6 out of 5 stars 1,895
4.6 out of 5 stars 6,422
4.6 out of 5 stars 2,730
4.7 out of 5 stars 834
4.6 out of 5 stars 5,336
4.5 out of 5 stars 2,081
Price
$50.00$50.00
$46.00$46.00
$46.00$46.00
$68.00$68.00
$50.00$50.00
$64.00$64.00
Hair Type
Hair prone to breakage & fall
Normal to dry, weak hair
Normal to oily, weak hair
Hair prone to breakage & fall
Hair prone to breakage & fall
Hair prone to breakage & fall
Purpose
Light, fortifying conditioner
Fortifying shampoo
Delicate fortifying shampoo
Intense fortifying hair mask
Fortifying heat protectant
Daily fortifying serum
Benefit
Immediate strength & softness
Intensely nourish & detangle
Gentles cleanse & strengthen
Smooth, detangle, & strengthen
Adds shine & prevents frizz
Strengthen hair & reduce fall
Key Ingredient
Ginger root
Ginger root
Ginger root
Ginger root
Ginger root
Ginger root
Usage
Can be used daily
Can be used daily
Can be used daily
Use once a week
Use when blow drying & styling
Can be used daily
Package Dimensions : 4.13 x 1.54 x 1.46 inches; 3.67 ounces
Manufacturer : Kerastase
ASIN : B0G3D8F18H
Best Sellers Rank: #1,101 in Beauty & Personal Care (See Top 100 in Beauty & Personal Care) #16 in Hair Loss Products
Customer Reviews: 4.5 4.5 out of 5 stars (2,081) var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });
Fortifiant Hair Serum: A daily strengthening serum designed to prevent hair fall due to breakage from brushing. Enriched with ginger and caffeine treatment improves resistance in weak brittle hair
Benefit: After use, 97% experience less hair fall due to breakage from brushing. Serum fortifies & strengthens to create nourished & healthy hair. Lightweight formula that will not leave residue
Additional Benefits: Contains Arginine, an ingredient that helps stimulate healthy hair by supporting strong blood flow to the root of hair cells. Can be targeted to areas with less density
Suggested Use: Use morning or evening for a minimum of 6 weeks. Apply 4 doses on dry or towel-dried scalp section by section. Massage to promote distribution and absorption into hair. Do not rinse.
Genesis Collection: Use with Bain Nutri-Fortifiant Shampoo, Fondant Renforcateur Conditioner, and Defense Thermique Primer for nourished healthy-looking hair with reduced breakage. Ideal for normal to dry weakened hair.
13 reviews for Kerastase Genesis Hair Serum | Daily Strengthening Treatment for Weak or Damaged Hair | Nourishes and Reinforces Hair | Anti-Breakage | Silicone-Free | For Weakened Hair | Serum Fortifiant
Add a review
$33.00
Shamanda Peña –
Strengthening & Growth Results: My Review of Kérastase Hair Growth Serum”
The Kérastase growth serum has honestly been a really good addition to my hair care routine. I started using it because I wanted to reduce hair fall and help my hair feel stronger and healthier over time.What I noticed first is that the serum is very lightweight and doesn’t make my scalp greasy, which makes it easy to apply daily or at night. It absorbs quickly and doesn’t leave any heavy or sticky feeling.After a few weeks of consistent use, my hair felt stronger and I noticed less breakage when brushing. I also started seeing small baby hairs, which made me feel like my scalp was actually responding well to the treatment.The scent is soft and luxurious, like most Kérastase products, and it makes the routine feel more like a self-care moment. The only downside is the price—it’s definitely an investment, but you don’t need a lot of product each time, so it lasts a while.Overall, it’s a great serum if you’re dealing with weak, thinning, or breakage-prone hair and want something that supports healthier growth over time.
Genesis –
Stronger hair and less breakage
This serum is a game changer for weak or thinning hair. It’s very lightweight and absorbs quickly without leaving any greasy feeling. I love the dropper because it makes application easy and precise directly on the scalp. After consistent use, I noticed less hair fall and my hair feels stronger and healthier. It also smells amazing and fits perfectly into my daily routine. Definitely worth it!
Karla | The Mom Edit –
Game-Changer for Weak & Damaged Hair!
I’ve been using the Kerastase Genesis Hair Serum – Daily Strengthening Treatment for a few weeks now, and the results are incredible. This serum has truly strengthened my weak, damaged hair and given it a noticeably healthier look and feel.The texture is lightweight and absorbs instantly without any greasy residue. I use it daily, and it nourishes my hair from root to tip while helping reduce breakage. My hair feels stronger, smoother, and more resilient — even on days after heat styling.I also love that it’s easy to use and doesn’t weigh my hair down. A little goes a long way, and the results speak for themselves. If your hair is fragile, prone to breakage, or just needs a boost of nourishment, this serum is definitely worth trying!Highly recommend!
Yurley Reyes –
This serum actually works!!
I’m currently on my second bottle, and this serum truly delivers results. With consistent use, I’ve noticed reduced hair fall and stronger, healthier-looking hair. The texture is lightweight, and the scent is amazing. Highly recommend!
Ashley ✨ –
This is a MUST!!
Man oh man! Finally something that actually helps! When I say my shedding is almost non-existent, I mean it. I would brush my hair or when I’m washing my hair, chunks of hair would come out. Now? A few strands here and there. My hair feels thicker and so much more healthier! Zero greasiness, great smell and over all just amazing! I have recommended this product to everyone I know! This will forever be a repurchase for me! Thanks kerastase!
Sthefany –
Good smell
Kerastace is good serum, I use this products for 3 weeks, I like the smell 😀 I hope my hair growth. The only thing is that the bottle is small and expensive. Its lightweight.
Amazon Customer –
This product works!
I have never felt compelled to write a review before, but this product has made me have a change of heart. Bottom line, this hair serum works and delivers everything as promised. I have always been insecure about my hair line framing the edges of my forehead; I believe the cause is from years of wearing tight hair-dos for sports, every day styles, etc. I purchased this serum before my wedding in October and have been absolutely blown away by the results. I can see noticeable growth in the areas of concern and can feel a major difference in the texture of my hair, thickness, and even length. I’ve also noticed a significant reduction in hair breakage around my face and an increase in shine! I have been getting compliments about how healthy my hair looks! I was a little hesitant about the price, and the $60+ price is the reason I’m giving this a 4/5, but would now recommend this to anyone looking to restore hair growth or wanting to improve overall hair health. Stay consistent with the application and you will see some serious results!
Shivabelle –
Genesis Serum
My Haircare Holy Grail!I’ve been using this product for years now and it continues to impress me.It has a lightweight almost waterlike consistency that makes it easy to apply after every wash.One bottle usually lasts me a few months though you might run out faster with daily use.The fragrance is a bit strong for my liking but the results make up for it.The U.S. version doesn’t contain aminexil though it still works wonderfully.While I can’t say much about actual hair growth I’ve definitely noticed less hair fall since I started using it.I usually pair it with the Kerastase 8H Overnight Serum.Definitely worth giving it a try
Sumaya –
رائع
MAYRA –
Es un producto que promete
Rita –
È un prodotto ottimo, mantiene le promesse. Effettivamente ho notato l’ effetto di miglioramento sulla caduta dei capelli
Slavica –
Ausgezeichnetes Haarprodukt, uneingeschränkt empfehlenswert
Valérie –
J’ai acheté la gamme entière de cette marque pour un problème de chute de cheveux anormale.Le shampoing, l’après shampoing et ici le sérum.C’est un peu plus contraignant car il faut mettre ce sérum grâce à une pipette sur le cuir chevelu, raie par raies tous les matins ou soir au choix.J’ai pu constater au bout d’un mois une nette amélioration sur ma chute des cheveux mais j’utilise la gamme entière.Il y a des résultats assez significatifs.C’est une gamme assez chère mais c’est plus un soin anti chute qu’une gamme pour la brillance ou la couleur.Le sérum se présente dans un flacon en verre avec une pipette pour mieux répartir le produit sur le cuir chevelu.En l’utilisant tous les soirs depuis un bon mois il m’en reste encore.Il faut bien l’appliquer sur l’ensemble du crâne et masser. Ne pas utiliser sur les cheveux sinon ça risque de coller un peu.Pour ce sérum je dirais qu’il a amélioré mon problème. Je valide.Bon rapport qualité prix.Livré rapidement dans une boîte en carton et arrivé sans cassé. Parfait pour moi.