The present invention relates to a method for treating damaged hair, where the hair is chemically treated, comprising the steps of: a) contacting the hair with a shampoo composition, the shampoo comprising: from about 5% to about 50% of an anionic surfactant from about 0.025% to about 5% by weight of a synthetic cationic polymer having a cationic charge density from about 2 meq/gm to about 7 meq/gm, wherein the synthetic cationic polymer forms lyotropic liquid crystals upon combination with the anionic surfactant and water and b) rinsing the composition from the hair, wherein following the treatment, the surface energy of the hair is reduced, as compared to that measured prior to the treatment.
