L'Oréal Professionnel Serie Expert Absolut Repair Cellular Repairing Conditioner for Very Damaged Hair: the formula with Lactic Acid, instantly conditions damaged hair and leaves hair feeling stronger, more supple and looking shiny as if transformed. Lactic Acid is able to create saline bonds between the keratin chains exposed in the cortex of damaged hair fibres.Directions for use: Apply L'Oréal Professionnel Serie Expert Absolut Repair Cellular Repairing Conditioner for Very Damaged Hair and work into shampooed and towel-dried hair. Rinse. .