I love this product!

[This review was collected as part of a promotion.] I use this product on dry hair just before using a flatiron. It really makes a noticeable difference on shine and frizz. It is part of my haircare routine and has been for a long time. I have noticed healthier hair because of it.

Originaly posted on  kerastase-usa.com

My Go To Item

[This review was collected as part of a promotion.] This serum makes my hair feel so sleek and smooth.

Originaly posted on  kerastase-usa.com

Wow!!!!

[This review was collected as part of a promotion.] Woooooow!! No hay más Palabras, es magnífico, se deja Puesto

Originaly posted on  kerastase-usa.com

Great Product - Leaves Too Much in the Bottle !

As much as I like this product - it is great for my thick hair - it is very expensive and after the pump stops working I can feel by the weight that there is still a good amount of product left in the bottle, but unfortunately there is no way to open it. I am throwing away at least 2 more applications, which is a waste and doesn't make me happy.

Originaly posted on  kerastase-usa.com

worked for my hair

[This review was collected as part of a promotion.] made my hair shiny and soft i would recommend for bleached hair

Originaly posted on  kerastase-usa.com

Good Product!

[This review was collected as part of a promotion.] My hair is quite dry from frequent coloring, but this product really makes a noticeable difference. It also smells amazing!

Originaly posted on  kerastase-usa.com

Good product

I like this stuff. It’s a two in one serum and cream. I have very fine thin hair and it doesn’t weigh it down.

Originaly posted on  kerastase-usa.com

Really Good

I liked how this felt on my hair. It really soacked this up.

Originaly posted on  kerastase-usa.com

Only product that works and protects my hairs

[This review was collected as part of a promotion.] I use this product before blow drying my naturally curly hair. I love the way it smells. It works great.

Originaly posted on  kerastase-usa.com

Looove

This has been a game changer for my hair! Feels so smooth and healthy without weighing it down at all

Originaly posted on  kerastase-usa.com

Absolute Must Have

I can’t live without this product. It not only protects and leaves hair soft, but somehow gives my hair a healthy texture.

Originaly posted on  kerastase-usa.com

Helps hair look healthy without weighing it down!

[This review was collected as part of a promotion.] This is a product I’ve used for years. The only reason I didn’t give it 5 stars is due to the price and the container…one side of the serum runs out before the other sometimes. It’s great for my dry, highlighted hair.

Originaly posted on  kerastase-usa.com

Smells great!

[This review was collected as part of a promotion.] Not only do I love the smell of this, but I love how it makes my hair feel. Helps tame frizz and makes my hair so shiny!

Originaly posted on  kerastase-usa.com

Leave my hair soft, no frizz, smells so good!

[This review was collected as part of a promotion.] I use this product on my wet hair before drying it and also on the length when dry. It leaves my hair soft, non frizzy and smells so good!

Originaly posted on  kerastase-usa.com

Great for split ends

[This review was collected as part of a promotion.] This is a great product for split ends. I originally bought it as a serum to use all over my hair, but I should have read the description better. My colorist let me know this is more for the ends of hair, and to get an oil for all over. It works great for what it is meant to and I love this line!

Originaly posted on  kerastase-usa.com

Perfect!!!

This product is perfect. My mom is also using this serum and we are very pleased of results

Originaly posted on  kerastase-usa.com

Will repurchase

Perfect for my thin fine longish hair. It feels like a great hair day every single time I use it . It takes 2 pumps

Originaly posted on  kerastase-usa.com

Wonderful Quality Product

Wonderful, great smell, works wonders on my damaged hair

Originaly posted on  kerastase-usa.com

Fantastic!!!

Love the smell and how well it works. Keeper in my routine

Originaly posted on  kerastase-usa.com

10/10

THIS IS THE BEST AND SMELLS SO GOOD! Has repaired my horribly damaged dry hair that has 15+ years of heat and full highights

Originaly posted on  kerastase-usa.com

Love it! The best styling product.

[This review was collected as part of a promotion.] I am a 40 years old guy with a dark brown, low faded cut hair. I use the BAIN FORCE ARCHITECTE collection. The shampoo, the mask, conditioner, the leave-in hair & scalp SERUM EXTENTIONISTE, and this the Sérum Thérapiste Hair Serum, because i wash my hair every day, blow dry it and straighten it. My hair does not look damage or unhealthy whatsoever with the daily 430 Fahrenheit straightener. And i use this serum to style my hair when i feel like to have a wet hair look, or the hair & scalp serum for a damp soft hair look. Just love it.

Originaly posted on  kerastase-usa.com

One of my favorite hair products

[This review was collected as part of a promotion.] Great for fine hair. Doesn’t weigh my hair down, and acts as a detangler.

Originaly posted on  kerastase-usa.com

love this serum

helps my damaged hair stay strong love it, would buy again

Originaly posted on  kerastase-usa.com

This is my ABSOLUTE FAVORITE product

I hope they never discontinue this product. It is the only thing that makes my hair manageable without weighing it down after the discontinued the dark pink serum.

Originaly posted on  kerastase-usa.com

Absolutely great.

[This review was collected as part of a promotion.] My hair is in love with this product, none of the shampoo, conditioner or serums I have bought I regret. My hair have changed so much(for better) since I started using Kérastase.

Originaly posted on  kerastase-usa.com

Beautiful shine

[This review was collected as part of a promotion.] I can’t get enough of this stuff! It makes my hair manageable, soft and shiny. It makes me feel like a million bucks.

Originaly posted on  kerastase-usa.com

Buy it!

Smells terrific and it does not leave your hair oily - have bought multiple times

Originaly posted on  kerastase-usa.com

The Best Serum/Hair Oil Duo!

[This review was collected as part of a promotion.] The best duo serum/hair oil to exist. It leaves my hair feeling so soft and is definitely one of the top 3 hair serum/oils. Another top serum is the night time serum by Kerastase.

Originaly posted on  kerastase-usa.com

I loved this product this is helping a lot my hair

[This review was collected as part of a promotion.] I highly recommend this product, my hair is very damaged due to many dyes and chemicals that caused my hair to become very dense.

Originaly posted on  kerastase-usa.com

Fantastic product

[This review was collected as part of a promotion.] This product makes my hair feel amazing. I love it so much.

Originaly posted on  kerastase-usa.com

Life changing product

This product was actually life changing. I’ve tried every anti-frizz serum, mask, leaving conditioner out there, and this product has been the only thing that’s consistently worked for me. Would highly recommend for people who struggle with frizzy hair!!

Originaly posted on  kerastase-usa.com

My hair drinks this in.

Moisturizing without being too heavy. Also, protects from heat.

Originaly posted on  kerastase-usa.com

Perfect serum

[This review was collected as part of a promotion.] I have damaged hair from bleaching it and it helps so much, this serum makes my hair smooth and healthier look. Seals the ends and leaves your hair smelling amazing!

Originaly posted on  kerastase-usa.com

I love this product!!

I love this product!! Kérastase always has the best products! I repurchased this because I can’t live without it! It helped my bleach damaged hair tremendously!!

Originaly posted on  kerastase-usa.com

Favorite thing ever

My most favorite hair product ever. Love it. I'm obsessed with the smell too. Makes my hair drastically better. I have extremely fine but very curly prone to floofiness bleached hair - weird combo.

Originaly posted on  kerastase-usa.com

The BEST

Smells very nice. Makes hair feel so Soft and smooth.

Originaly posted on  kerastase-usa.com

amazing

i love this product so much i just wish they sold a bigger size

Originaly posted on  kerastase-usa.com

Must Have!

[This review was collected as part of a promotion.] I LOVE THE SMELL!!!! This was one of my first products, I have course thick hair and I noticed a difference immediately smooth less frizz and my ends looked healthier. I just ordered my 2nd bottle, I ran out last week and noticed a difference...way better with it, and again...smells fantastic

Originaly posted on  kerastase-usa.com

Love love love

I have repurchased this product several times. I have damaged hair from bleaching it and it helps revive my hair, smoothing it out whether I want to style it or let it air dry.

Originaly posted on  kerastase-usa.com

Perfect Finishing Product after Blowout

Smooths flyaways, seals ends, protectects blowout from humidity and adds shine without weighing hair down or looking greasy.

Originaly posted on  kerastase-usa.com

The best

I have long highlighted hair and this Kérastase serum is a game changer. I put it on freshly dried hair every time and it adds moisture, frizz control and my hair is shiny and looks so healthy. Highly recommend!

Originaly posted on  kerastase-usa.com

Excelente

[This review was collected as part of a promotion.] It does its job, good results and leaves your hair smelling good

Originaly posted on  kerastase-usa.com

Realmente bueno

[This review was collected as part of a promotion.] Este producto es realmente bueno, huele muy bien, un olor que dura todo el día, aparte que deja el cabello extremadamente suave, lo recomiendo

Originaly posted on  kerastase-usa.com

Great for growing out hair!

[This review was collected as part of a promotion.] I didn't think this serum would be as game changing as it would be. I can feel a difference in my ends, especially when I blow dry my hair curly or straight!

Originaly posted on  kerastase-usa.com

love it

[This review was collected as part of a promotion.] The **Sérum Thérapiste Hair Serum** by Kérastase is a fantastic solution for repairing damaged, over-processed hair. Its lightweight formula smooths and nourishes hair without weighing it down, leaving it soft, shiny, and more manageable. It also provides heat protection, making it ideal for those who use styling tools. The serum has a pleasant, subtle fragrance that doesn’t linger too long. While it’s a bit pricey, the results—healthier, stronger hair—are worth the investment. Perfect for anyone struggling with dry, brittle hair, it’s a must-have for deep hydration and repair. Highly recommended for damaged hair types.

Originaly posted on  kerastase-usa.com

amazing product

Amazing, love this and will use forever. My hair is so much healthier

Originaly posted on  kerastase-usa.com

Super soft hair

[This review was collected as part of a promotion.] Love this product! My hair feels so much healthier and soft after using it.

Originaly posted on  kerastase-usa.com

Perfect for my low maintenance style.

[This review was collected as part of a promotion.] This product is perfect for my fine hair. It does not leave an oily residue rather makes my hair silk and smooth.

Originaly posted on  kerastase-usa.com

Love this product

[This review was collected as part of a promotion.] Love this product. Only product I can use to keep my hair and scalp healthy.

Originaly posted on  kerastase-usa.com

Best product

My hairstylist uses this on my hair every time I go and I finally decided to order for myself. Obsessed!!!

Originaly posted on  kerastase-usa.com

Perfect Styling Product!

I use this after blowdry and for my hot tools styling. Since using this product along with Keratase Products my hair has never been stronger, balanced, and shiny. I can not say enough about this product, get it and you'll see a difference as well!

Originaly posted on  kerastase-usa.com

Miracle Serum

This serum works miracles on dry, damaged hair! Love it.

Originaly posted on  kerastase-usa.com

Using as sub for discontinued Fibre Architect

Used Fibre Architect for years and loved it. Still sad that it’s discontinued by Kerastase. I’m trying this as a substitute for Fibre Architect — and although the styling hold is not as distinct, I will keep using it because it’s almost impossible to find a lightweight styling cream that isn’t stiff or sticky and helps control frizz and flyaways especially around my face. It gives the “piecy” look I love without buildup or stiffness. Not as much “hold” as Fibre Architect but will keep using Serum Therapiste - because I can’t find a perfect replacement for Fibre Architect. (Bring it back please!)

Originaly posted on  kerastase-usa.com

best for smoothing, leaves volume

good serum for detangling/strengthening/smoothing hair. It doesn't weigh down hair at all. Give it 10 minutes and it will fully absorb even into fine hair. My hair looks and feels like silk with it.

Originaly posted on  kerastase-usa.com

Great Product

I have been using this serum for well over two years now and find it to be best product in its category.

Originaly posted on  kerastase-usa.com

Great product to keep hair healthy

The serum is an excellent compliment to the shampoo and conditioning treatment. Leaves my thin, but curly hair shiny and smooth.

Originaly posted on  kerastase-usa.com

Wonderful Serum

[This review was collected as part of a promotion.] I love this serum because it isn’t oily and doesn’t weigh hair down. It makes your hair look and feel so healthy.

Originaly posted on  kerastase-usa.com

Beautiful scent!

[This review was collected as part of a promotion.] I love using this for its function- BUT the smell is divine! Love it and can never be without it!

Originaly posted on  kerastase-usa.com

Excellent

[This review was collected as part of a promotion.] This product is amazing and left my hair extremely healthy and soft.

Originaly posted on  kerastase-usa.com

Amazing smell

I love the smell, it stays in your hair and makes you feel very pampered. Aside from the smell, I felt a noticeable difference in the texture of my hair with this product. Really helped my brittle hair after a bad bleach job.

Originaly posted on  kerastase-usa.com

Does the job

This serum is the best! It has my hair looking fuller than ever.

Originaly posted on  kerastase-usa.com

Nice concept/Defective mechanism

Only the oil side of the pump works, even after keeping it standing upright for weeks.

Originaly posted on  kerastase-usa.com

No Results and Poor Pump Design

Didn't see results. Too expensive for such little product. Also, the pump seems to separate the cream from the gel. It's hard to get product out from the pump. With so many other Keratase products that produce results, this is a pass for me in the future.

Originaly posted on  kerastase-usa.com

Awesome

[This review was collected as part of a promotion.] I love it! My hair is smoother and the product smells so good! Highly recommend

Originaly posted on  kerastase-usa.com

So unique and rich.

This is such a unique product. It has two separate portions in one bottle, a gel like serum and a creamy rich serum that you mix together. Super creative and it works amazingly too.

Originaly posted on  kerastase-usa.com

Love it.

[This review was collected as part of a promotion.] Been loving this product. I struggle with a lot of breakage. Especially at my part but this has helped those little hairs stay strong enough to grow out.

Originaly posted on  kerastase-usa.com

bleached hair miracle

i've been using this serum for 2 months now and i have fallen in love with it! i have medium length/ thin medium bleached hair. this serum smooths my hair out so well, smells great and has lasted a long time despite how much product you get.

Originaly posted on  kerastase-usa.com

Helps

I really like this formula-cream and clear serums together. Definitely makes my ends look and feel better.

Originaly posted on  kerastase-usa.com

Amazing product!! A must have for fine thin hair!!

[This review was collected as part of a promotion.] I love this product! Very lightweight!! Will rebuy

Originaly posted on  kerastase-usa.com

Love it

Ive been using this since I got it! I did not realize you can use it on dry hair!! Great product my hair has transformed with this!

Originaly posted on  kerastase-usa.com

Love this product

This is my go to for restoring a healthy feel and elasticity to my hair.

Originaly posted on  kerastase-usa.com

HOLY GRAIL SERUM

I have used this product for years and it still continues to be my favorite serum ever. it beats any Oribe, Shu eumura, or any other brand. The smell is amazing. LOVE IT!!!!

Originaly posted on  kerastase-usa.com

My hair is in love ...

[This review was collected as part of a promotion.] A favorite of mine in my hair care routine. The serum is silky, goes on easily, my hair feels smooth, makes it shine and it smells great.

Originaly posted on  kerastase-usa.com

Really good

I love it! Love the smell and helps so much with my crazy damaged bleached hair. Can’t live without, so lightweight and ease my frizzy hair.

Originaly posted on  kerastase-usa.com

Love it

Is really amazing, love the way it leaves my hair😍😍

Originaly posted on  kerastase-usa.com

Hair thoughts

This serum leaves your hair super soft. I use it on the ends to keep them from looking burned from the hair drying.

Originaly posted on  kerastase-usa.com

Best Serum Available!

[This review was collected as part of a promotion.] This product really heals hair - making it soft, shiny and healthy looking!

Originaly posted on  kerastase-usa.com

Amazing !!

[This review was collected as part of a promotion.] Made hair soft and healthy again ! Love this product

Originaly posted on  kerastase-usa.com

Absolute Favorite

This is my favorite product and I use it everyday. I use it on wet hair after the shower or on dry hair as well along with a Kerastase hair oil. Holy grail product!

Originaly posted on  kerastase-usa.com

Nourishing

[This review was collected as part of a promotion.] This product really nourishes the hair and helps tame frizz, I love this product!

Originaly posted on  kerastase-usa.com

My favorite product

Excellent product to make hair feel healthy and shiny

Originaly posted on  kerastase-usa.com

Stronger lengths and ends!

Have been using for 3 weeks now and lengths and ends are much stronger and healthier than ever.

Originaly posted on  kerastase-usa.com

Love it

[This review was collected as part of a promotion.] I love this serum, and can’t live without it!!! The best Every time my hair is dry, I use it in the ends and the magic happens

Originaly posted on  kerastase-usa.com

A must have.

[This review was collected as part of a promotion.] This serum is one of the best products I have ever used. I have been a hairstylist for almost 20 years and worked with multiple product lines. I always have it in my tool box and my clients always ask for it. It smells divine and it works well.

Originaly posted on  kerastase-usa.com

Magic

[This review was collected as part of a promotion.] This is like a fresh trim in a bottle. I love the combination of oil and cream.

Originaly posted on  kerastase-usa.com

Best ever!

[This review was collected as part of a promotion.] This product has slowly changed the texture and shine of my hair. I can’t even believe it!!

Originaly posted on  kerastase-usa.com

Love this stuff

[This review was collected as part of a promotion.] I use this after I wash my hair. It smells delightful. It is my favorite product of Kerstase

Originaly posted on  kerastase-usa.com

Love the smell, it has saved my hair

I honestly purchased this product after my hairstylist used it on my hair...Oh, the smell, amazing. I use this on the length of my hair, and it leaves my hair looking healthy and smelling amazing. I use these 3 to 4 times throughout the week. Wish I took before and after pictures. Great product.

Originaly posted on  kerastase-usa.com

Best Serum Ever!!

I’ve been using this product for over a year now and it’s the best serum for my hair. I love using it in my clients hair and it provides the softest curls and controls phrase and smells amazing.

Originaly posted on  kerastase-usa.com

it I like it it is very good.

it I like it it is very good. it I like it it is very good. it I like it it is very good.

Originaly posted on  kerastase-usa.com

HAIRsaver

Daily use provides me unbeliveable condition hair!

Originaly posted on  kerastase-usa.com

Only Heat Protectant I Will Use

[This review was collected as part of a promotion.] I've tried so many different heat protectants from Kerastase, and although I'm certain they each work for a particular hair type, I'm always left with oily-looking, limp hair that's overburdened with product, no matter how little I use. But not with the Sérum Thérapiste. It is exceptionally light yet also keeps split ends and breakage to a minimum. It also lends a lovely sheen to my hair that is unparalleled. And just a pump or two is ample for shoulder-length hair. This is literally the only heat protectant I will use for fine hair.

Originaly posted on  kerastase-usa.com

It did not work for my dry hair

Not helping with the Dryness. I feel like my hair is falling more than usual. It’s dry and not shiny at all. I have used this line of shampoo with a pre-shampoo conditioner and the results were amazing but this time around it’s discontinued so I’m using the shampoo and this product and I don’t see the benefit. I’m wondering why that was discontinued.

Originaly posted on  kerastase-usa.com

Good but.. .

Great serum, but one side of the serum ran out way faster than the other. I think it helped my hair, but I wish it came in a larger size

Originaly posted on  kerastase-usa.com

Impressive Product

I have used this product for quite a while and highly recommend it. Truly transforms the hair making it manageable and seems to repair and help it grow

Originaly posted on  kerastase-usa.com

The best smell ever.

This serum is AMAZING. It smells soooo good, and it helps with my frizz instantly (which is not easy).

Originaly posted on  kerastase-usa.com

Amazing two in one treatment/oil

The best for hair repair and heat protection for damaged hair

Originaly posted on  kerastase-usa.com

Deja el cabello suave y con brillo!

Demasiado caro para tan poco producto no lo compro más! 🫤🫤

Originaly posted on  kerastase-usa.com

Best Serum

[This review was collected as part of a promotion.] My hair is the smoothest and shiniest it's ever been each time I use this product.

Originaly posted on  kerastase-usa.com

Great product

[This review was collected as part of a promotion.] This really helps with detailing and hear protection

Originaly posted on  kerastase-usa.com