A hair straightening and/or hair relaxing method comprising: applying a hair care composition to hair, wherein the composition comprises a sugar, a buffering agent and a cosmetically acceptable carrier； and wherein, where the composition is heated to a temperature of at least 100° C., the composition comprises from about 6% to about 20% reducing sugar； hair drying； providing a hair straightening appliance at a temperature of from about 100° C. to about 280° C. and mechanically straightening the hair with the appliance.
