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Emily Ratajkowski Healthy Hair After Fusio Dose Treatment

10 Things You Should Know About Fusio-Dose Hair Treatment

Fusio-Dose is Kérastase’s iconic, in-salon customized hair care treatment. Fusio-Dose launched back in 2011 and has been pushed to the next level in 2022, with the addition of concentrated skincare actives.

Fusio-Dose: Your 10 Questions Answered

Discover the 10 reasons why our customized treatment has stood the test of time (and why you should definitely try it if you haven’t).

1 . What is Fusio-Dose?

With up to 30 unique combinations, NEW Fusio Dose in-salon treatments instantly transform your hair. Composed of two parts, a concentre and a booster, Fusio Dose treatments are performed by trained Kerastase stylists to help you address your main hair concerns and are formulated based on your hair goals.


With up to 30 unique combinations, NEW Fusio Dose in-salon treatments instantly transform your hair. Composed of two parts, a concentre and a booster, Fusio Dose treatments are performed by trained Kerastase stylists to help you address your main hair concerns and are formulated based on your hair goals.


2. What is the difference between the Booster vs. Concentre?

Starting with the Concentre, these highly concentrated vials address your main hair concern. A concentre is then mixed with a Booster, packed with powerful skincare active ingredients, to help you reach your hair goals.

Kérastase Fusio-Dose Custom Hair Treatment Booster vs. Concentre

3. How many mixes are possible with Fusio-Dose?

Kérastase Fusio-Dose Custom Hair Treatment Mix and Match

With 6 Concentrés and 5 Boosters available, there are up to 30 different mixes possibilities. It allows you to target two unique hair concerns at the same time.

4. Who is this custom hair treatment right for?

Even those who take excellent care of their hair sometimes need a boost. Stress, styling, and environmental factors can weaken the hair gradually, causing it to look dry and dull, behaving in strange, unruly ways. When hair begins to exhibit signs of stress, there is a quick, easy fix available at your nearest Kérastase salon—our signature Fusio-Dose custom hair treatment. With a fresh, personalized mix of a Concentré and a Booster, Fusio-Dose immediately transforms your hair based on your stylist’s expertise for 95% less breakage*, 70% more shine** and 24h anti-frizz protection***

*Instrumental test after using Concentré Genesis + Booster Reconstruction
**Instrumental test after using Concentré Chroma Absolu + Booster Brillance
***Instrumental test after using Concentré Chroma Absolu (or Nutritive) + Booster Anti-Frizz

Kérastase Fusio-Dose Custom Hair Treatment

5. How does it work & how long does the custom hair treatment take?

Kérastase Fusio-Dose Custom Hair Treatment

Before beginning your treatment, your stylist will diagnose your hair. Depending on what your hair needs most, they will select a Concentré and Booster to combine and spray onto the hair at the back bar. Within 5-minutes, your tailor-made treatment will be complete and you’ll be flaunting lush, re-energized hair all day!

6. Is Fusio-Dose the same as a hair mask?

It replaces your fondant or mask in-salon treatment, but it isn’t the same. Fusio-Dose molecules are up to 100 times smaller than a traditional haircare product and it is supplemented with skincare actives.

Kérastase Fusio-Dose Custom Hair Treatment

7. Can I do a Fusio-Dose at home?

No, it is a Kérastase exclusive salon service. The Fusio-Dose custom-blended formula requires a professional evaluation of your hair to determine the best mix for you.

8. How do I know which Fusio-Dose mix is right for me?

Your hairdresser will perform a detailed professional diagnosis of your hair to define your main hair need and Concentré. Your hairdresser will then discuss your hair goals to pick the right booster.

Kérastase Fusio-Dose Custom Hair Treatment

9. How often can I book a Fusio-Dose custom hair treatment?

Kérastase Fusio-Dose Custom Hair Treatment

Every salon visit! Your stylist will diagnose your hair and create a freshly-mixed formula that specifically targets your current hair concerns with the correct blend of concentrated actives. Your stylist will then recommend and adapt the formula each time to suit your hair needs as they evolve with every visit. Find your nearest Kerastase salon and book a Fusio Dose service today!

10. What are the benefits of Fusio-Dose?

Fusio-Dose transforms your hair in less than 5 minutes, with a custom-blended mix that addresses 2 hair needs in 1 application!

Kérastase Fusio-Dose Custom Hair Treatment

Real Hair Transformations

Discover the 6 Concentrés & 5 Boosters of Fusio Dose

Curious about your Fusio-Dose blend?

Use our Fusio-Dose Mix & Match tool to find the perfect treatment blend to address your hair concerns and hair goals.
Select a concentre and booster to unlock the transformative benefits that are unique to each Fusio-Dose blend.

*results are vs. non-conditioning shampoo

Share Your Experience

Read genuine reviews from Kérastase clients on our Fusio Dose Page.
Have you already tested Fusio Dose? Tell us what you thought about your Fusio-Dose experience!
Share your experience with the Kérastase community and learn more about each of our new Boosters and Concentrés.


Read Customer Reviews
And Leave Yours!

Want to try the real thing?

Find the nearest Kerastase salon to you and book a Fusio Dose service today!

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