Shampoo for long, damaged hair. The Shampoo from the Kérastase résistance series is ideal for strained, long hair, as it makes your hair shiny and supple again. Each fiber is reconstructed by creatine, revitalized, shiny and smooth. Taurine gives your hair more resistance and invigorates the scalp. The products of the resistance extentioniste line improve the damaged hair structure and give hair noticeably more suppleness and shine.