This concentrated, sulfate-free shampoo has been specially formulated to care for damaged, colour-treated hair. Featuring Pureology's exclusive Asta-Repair with Astaxanthin, a powerful nature-derived antioxidant, plus Keravis, Ceramide and Arginine to help heal and repair damaged, micro-scarred hair, Strength Cure helps to restore strength and add softness while protecting colour vibrancy.