The expert Acidic Bonding Concentrate Shampoo works to cleanse, strengthen and intensely condition hair while reinforcing weakened bonds. Formulated with citric acid and a concentrated bonding care complex, this restorative Redken shampoo is perfect for those with damaged, demanding, and processed hair. Boasting a luxurious, ultra-rich lather, this advanced shampoo has a pH-balancing effect to protect your locks against the negative impact of hair colouring, styling and even water. Gentle on hair, the unique Acidic Bonding Concentrate Shampoo leaves locks feeling more manageable, smoother and shinier - from root to tip. Free of sulfates to provide for more gentle cleansing.. Key Benefits Up to 56% less breakage* Up to 76% of split ends appear reduced** Up to 11x smoother hair***, system tames frizz and adds intense shine pH-balancing for colour-fade protection For all hair types and textures Contains citric acid, an alpha hydroxy acid, which conditions to help protect weak bonds * Brushing Test. When used as a system of Acidic Bonding Concentrate Shampoo and Conditioner vs. Classic Shampoo on Bleached Hair ** Visual Grading. When used as a system of Acidic Bonding Concentrate Shampoo, Conditioner and Leave-In Treatment vs. classic shampoo on bleached hair *** When used as a system of Acidic Bonding Concentrate Shampoo, Conditioner and Leave-In Treatment