The ultimate luxury ritual for hair that transcends time. Revitalize your fiber from start to finish in three transformative steps: Cleanse with Bain Régénérant for instant strength and vitality. Nourish with Masque Intense Régénérant for instant and lasting smoothness. Reverse time with Overnight Youth Serum to target 5 signs of hair aging. #Kerastase #Chronologiste #HairLongevity #HairCare #Longevity