Abstract: A hair relaxation composition is provided. The hair relaxation comprises an activator containing a thiosulfate compound, an acidifier that preferably does not impart a color change to the hair, and a catalyst. The composition has a pH ranging from about 3.0 to about 4.5. A method for relaxing hair is also provided. A composition as described above is applied to the hair. The composition is allowed to remain on the hair for a period of time ranging from about 10 minutes to about 60 minutes. The composition is removed from the hair. The application, standing and removal steps are then repeated.