Redken Acidic Bonding Concentrate Shampoo is Redken's most concentrated all-in-one formula for all hair types and textures. Featuring Citric Acid, an alpha hydroxy acid within our concentrated bonding care complex that conditions to help protect weak bonds and helps to improve hairs strength and resiliency after a bleach or color services. This pH-balancing shampoo is specifically formulated with an acidic pH to help to defend against the potential negative effects that can be caused by hair coloring, lightening and heat styling. The result? Hair that looks and feels healthy!