The Kérastase Dual Treatment Thérapiste Serum is an innovative 30ml treatment designed for damaged and fragile hair. Its biphasic formula combines una lightweight texture and a regenerating concentrate, deeply repairing the hair fiber and strengthening the struttura of the hair. Thanks to its nourishing and elasticizing action, it provides softness, shine, and protects against future breakage. Ideal for those who want revitalized, strong, and visibly healthier hair, this serum is an essential ally for the daily well-being of treated hair.