The current application discloses a composition that comprises at least one peptide with a sequence length of 6-12 amino acids, where 2-5 of those amino acids are cysteines for the treatment and cosmetics of animal hair, in preference human hair. There are several hair styling methods that involve breakage and reestablishment of disulfide bonds, allowing relaxation and straightening of the hair. However, the most effective methods currently used to modulate hair contain harmful chemicals. Thus there is a constant demand for formulations that efficiently model the hair fiber without damage. Thus, the present invention aims to provide a composition for treatment of the hair, including animal and human hair, without the use of chemicals harmful to the hair fiber and consumer health and uses of said compositions in shampoo, lotion, serum, cream, conditioner, foam, elixir, oil, aerosol or mask.
