Cosmetic use of a compound (I) capable of increasing growth stimulating hormone (GSH) rate to prevent and/or to limit and/or to stop the waltness of hair. Independent claims are also included for: (1) cosmetic composition (A) to fight against the waltness of hair comprising in a cosmetically acceptable medium at least (I) capable of increasing the GSH rate associated to another active fighting agents of the desquamative states of the scalp, agents supporting cuticle pusher of the hair, and vegetable extracts with active propigment compound; and (2) a process of cosmetic treatment of the waltness of hair comprises administering on the zone to treat (A) comprising (I). ACTIVITY : Endocrine. MECHANISM OF ACTION : Increasing the growth stimulating hormone rate.