Kérastase Fusio-Dose is an in-salon treatment that combines highly concentrated care formulas with powerful boosters for custom-designed results. It can treat both primary and secondary hair concerns in a single application. The program can be adapted to every hair type for targeted efficiency, penetrating deeply into the hair fibre without weighing it down. There are 20 tailor-made combinations available, which are created from four different concentrates fused with five different boosters. Thanks to the Kérastaste diagnostic camera, which analyses the hair and scalp at a magnitude of 600 times, hairstylists can create a precise hair diagnosis and identify the client’s primary and secondary hair needs. The primary need corresponds to the condition of the hair and determines the choice of concentrate, while the secondary need is related to the individual’s personal expectations such as shine, density or manageability, and determines the most suitable booster.