Updated September 2026

Kerastase Fusio-Dose is a personalized in-salon treatment for dull, dry or stressed hair. Your stylist checks your hair, then mixes a formula made just for it. You can add it to a color, cut or styling visit. This guide explains how Fusio-Dose works, what it can target, and how it fits with your other services.

What Is Kerastase Fusio-Dose?

Fusio-Dose is a signature treatment from Kerastase that is only available in salons. It has two parts. A concentre targets your main hair concern, and a booster targets a second one. Kerastase says this gives up to 30 combinations, so the treatment can be matched to many different hair needs.

How Fusio-Dose Works

Every treatment follows the same simple path.

  1. Diagnosis. Your stylist looks at your hair and asks about your concerns and goals.
  2. Main concern. They choose a concentre to address your top priority.
  3. Second concern. They choose a booster to address another need.
  4. Mix and apply. The formula is mixed fresh for you and applied to your hair.
  5. Style. Your stylist rinses and styles your hair, so you can see and feel the change before you leave.

What Fusio-Dose Can Target

Different combinations focus on different needs. Common goals include the following.

  • Dryness and dullness, with more moisture, softness and shine
  • Breakage and weak strands, with extra strength and repair
  • Frizz, for a smoother finish
  • Color-treated hair, to help keep color looking fresh and glossy
  • Brassiness in blonde hair, with tone-correcting options

Your stylist will pick the combination that fits your hair, so you do not have to guess.

Signs Your Hair Could Use a Treatment

  • Your hair looks dull even after a fresh cut or color.
  • The ends feel dry, rough or tangle easily.
  • Frizz shows up as soon as the weather turns humid.
  • Your color fades or turns brassy sooner than you expect.
  • Hair snaps or breaks when you brush it.

Fusio-Dose vs a Home Hair Mask

A good mask is a great habit between visits. Fusio-Dose adds something a home product cannot: a professional diagnosis and a formula mixed for your hair that day. Kerastase notes that in-salon treatments can deliver stronger results in a shorter time than at-home care alone.

Who Should Try Fusio-Dose?

It suits many hair types and many concerns. It can be a good fit if your hair feels dry, looks dull, frizzes in humid weather or shows wear from color and heat styling. Ask your stylist whether it makes sense for your hair.

How to Add It to Your Visit

Fusio-Dose works well as an add-on. Many clients book it with a color appointment to keep color soft and shiny, or with a cut to refresh dry ends. If your hair is very damaged or bleached, your stylist may also suggest Olaplex. Read our comparison of Kerastase vs Olaplex to see how the two differ.

Keep Your Results Going at Home

Use a sulfate-free shampoo and a conditioner made for your hair type. Add a weekly mask, and use a heat protectant when you style. Our routine for dry hair has a full plan. In Dallas heat, our guide to humidity and your hair can help too.

Book a Consultation

Every plan starts with a conversation about your hair, so you get the right treatment. Book online at our North Dallas salon, or see all of our locations. Ask about Fusio-Dose when you book. If you also color your hair, see our hair color in Dallas page. You can also learn more about the treatment on the Kerastase USA website and in the Kerastase guide to 10 things to know about Fusio-Dose.

Frequently Asked Questions

What is Kerastase Fusio-Dose?

It is a personalized in-salon treatment. Your stylist mixes a concentre for your main concern with a booster for a second concern.

Is Fusio-Dose better than a hair mask?

A mask is a good habit between visits. Fusio-Dose adds a professional diagnosis and a formula mixed for your hair, so results can be stronger.

Can I add Fusio-Dose to a color appointment?

Yes. It is popular as an add-on to color, cuts and styling. Ask when you book.

Is Fusio-Dose good for color-treated hair?

Yes. There are combinations aimed at color care, shine and tone. Your stylist will choose the right one.

How often should I get Fusio-Dose?

It depends on your hair and your routine. Your stylist will suggest a schedule at your consultation.

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Related reading: Kerastase vs Olaplex · Routine for dry hair · Your first hair consultation

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