PROBLEM TO BE SOLVED: To provide compositions for keratin fibers for hair reconstitution, particularly for permanent waves, which cause less damage to keratin fibers and can eliminate or reduce the odor, while having a sufficient re-orthopedic efficiency to keratin fibers, such as hair.SOLUTION: A composition for keratin fibers contains (a) at least one compound selected from cysteamine, cysteamine derivatives, their salts, and their mixtures, (b) at least one compound selected from mercapto carboxylic acid except cysteine, mercapto carboxylic acid derivatives, their salts, and their mixtures, and (c) at least one compound selected from cysteine, cysteine derivatives, their salts, and their mixtures, wherein the pH is less than 9.0.SELECTED DRAWING: NoneCOPYRIGHT: (C)2017,JPO&INPIT【課題】毛髪等のケラチン繊維に対して十分な再整形効率を有するとともに、ケラチン繊維の損傷が少なく、悪臭をなくす又は減少させることができる、毛髪再形成用、特にパーマネント用のケラチン繊維用組成物の提供。【解決手段】(a)システアミン、システアミン誘導体、それらの塩、及びそれらの混合物から選択される少なくとも1種の化合物と、(b)システインを除くメルカプトカルボン酸、メルカプトカルボン酸誘導体、それらの塩、及びそれらの混合物から選択される少なくとも1種の化合物と、(c)システイン、システイン誘導体、それらの塩、及びそれらの混合物から選択される少なくとも1種の化合物とを含み、pHが、9.0未満である、ケラチン繊維用組成物。【選択図】なし
