Fusio-Dose is the iconic in-salon custom treatment from Kérastase. Fusio-Dose was relaunched in 2011 and in 2022 it has been taken to the next level with concentrated facial care actives for higher performance. Schedule an appointment at your nearest Kérastase salon to enjoy this treatment that will change your hair! Fusio Dose is a Kérastase service, only available in the salon. It is a care of liquid technology, for an instant transformation of the hair. Consisting of a custom mix between a Concentré and a Booster, it is the perfect quick solution for all hair types. Fusio-Dose is a personalized treatment. With 6 Concentrés and 5 Boosters available, there are up to 30 different mixes. It allows you to work on 2 concerns in 1 single treatment. Concentré Chroma Absolu is a care concentrate intense after coloring, enriched with amino acids: - Helps reduce damage caused by coloring - Reinforces weakened colored hair from the inside - Enhances shine and luminosity - Intensive care and reinforced protection of colored hair Mode of Use: Step 1: Combine it with the Booster of choice Step 2: Apply to lengths and ends Step 3: Clarify.