One of Redken's best-selling products, Redken Extreme Shampoo is now available in a 500ml supersize to keep hair repaired and strengthened for longer. This strengthening shampoo for damaged hair cleanses, repairs strength, and adds flexibility, as well as fortifies weakened areas and restores/repairs damage while protecting the natural shine of hair. One of Redken's best-selling products, this hair strengthening shampoo cleanses, strengthens and fortifies weakened areas of the hair. Using the full system with Extreme's Shampoo, Conditioner and Anti-Snap will help your hair to have a 73% decrease in breakage and become 3x stronger. Instrumental test conducted NJ, USA, 2010. Automatic brushing test to evaluate the anti-breakage/ strength integrity of the hair with shampoo, conditioner & leave in vs non-conditioning shampoo. Redken Extreme Shampoo 500ml - Worth £38 in Clear