Is your hair looking a little damaged? The Redken Extreme product line is the ultimate product for dry, dull, and damaged hair. Redken Extreme Shampoo is a cleansing shampoo designed for hair that is distressed and over-processed. Redken Extreme Shampoo uses the RCT Protein Complex that ensures treatment from the root, to the core, to the tip (RCT = Root, Core, Tip). Not only does this shampoo cleanse and restore damaged hair, but it protects your hair against future breakage.