The Strenght Cure range repairs and restores weakened hair thanks to an antioxidants and fortifying proteins rich formula The Anti-Fade complex combined with the exclusive Asta-Repair complex create a product more than perfect for chemically treated hair. Cleanse and help fortify micro-scarred/damaged colour-treated hair with Strength Cure Shampoo. The ZeroSulfate formula, with Asta-Repair including Astaxanthin: a known powerful antioxidant, and our exclusive AntiFade Complex, helps strengthen and repair damage, leaving color-treated hair beautiful.