The present disclosure relates to a cosmetic composition for treating a keratinous material, comprising a) at least one organic silicon compound and b) an anionic, nonionic and/or amphoteric surfactant capable of caring for stressed hair.

Disclosed herein are skin care compositions, comprising vitamin E (e.g., alpha-tocopherol), a thiourea derivative of histidine (e.g., ergothioneine), a vitamin B3 compound (e.g., niacinamide) and/or a pyrrolidone carboxylic acid and/or a salt thereof (e.g., sodium PCA) as well as to methods of using these compositions.

The present disclosure relates compositions and methods for altering the color of the hair, the compositions comprising at least one amino acid, at least one carboxylic acid, optionally at least one amine, and at least one hair coloring agent.

A dye composition I, comprises: a) at least one oxidative dye(s), b) at least one thickener selected from anionic polymer(s), and c) at least one antioxidant including thiol-derived reducer(s). A kit comprises (1) the dye composition I and (2) oxidizing composition IL, comprising at least one oxidant.

The present invention relates to novel hair treatment materials, and in particular materials for shaping hair and/or strengthening the hair. Also described are the use of these compounds in hair care formulations for shaping, straightening, strengthening or treating the hair, and the use of the compounds for hair straightening and/or hair strengthening.

The present invention is a versatile cosmetic composition in form of a liquid concentrate which is useful as additive or ingredient for conventional keratin fiber treatment compositions. It can be used as ready to use additive to conventional yet damaging treatments to which it is added at the time of the treatment. Such treatments are typically hair bleaches, hair colorants or permanent wave compositions. The concentrate comprises a combination of ingredients intended to reduce damage during treatments and/or to prevent undesired deposits on fibers. Such a composition comprises at least a thiol and a polymer or copolymer comprising cystine units. Such a composition is further useful as additive or ingredient for a keratin fiber caring or repairing composition to reduce damage caused by prior treatments and/or reduce undesired deposits on fibers by using the concentrate directly after treatments causing such deposits.

Disclosed herein are skin care compositions, comprising vitamin E (e.g., alpha-tocopherol), a thiourea derivative of histidine (e.g., ergothioneine), a vitamin B3 compound (e.g., niacinamide) and/or a pyrrolidone carboxylic acid and/or a salt thereof (e.g., sodium PCA) as well as to methods of using these compositions.

A dye kit comprising: (A) a dyeing composition (A) and (B) a pyrazolone composition (B) comprising a retarding combination of pyrazolone compound and a reducer.

Compositions, kits, and methods for repairing bonds, for example, disulfide bonds, in hair or on the skin are disclosed. The compositions provide improved conditioning benefit for dry hair or moisturize the skin. The compositions also provide a long lasting moisturized feel and smooth feel to the skin or hair, without feeling greasy. The compositions contain one or more compounds that covalently bind at least two thiol groups in the hair or on the skin. Use of the binding compositions prevents reversion of the repaired bonds to their free thiol state, for at least one week or one month, or more, after a single application of the composition. Improved methods of styling hair, for example permanent hair waving, hair curling, hair coloring or highlighting, and hair straightening, are also provided.

A dye package comprises: (A) a dyeing composition comprising: (I) a colorant composition comprising at least one oxidative dye(s); and (II) a developer composition comprising at least one oxidant; and (B) an AMPS composition, wherein the AMPS composition is placed in a chamber separate from the dyeing composition (A).