Abstract: The invention relates to a process for dissolving at least one compound of low solubility in water, the said process comprising the essential step of mixing the compound of low solubility with at least one lipophilic amino acid derivative. The invention also relates to a cosmetic or dermatological composition comprising, in a physiologically acceptable medium, at least one compound of low solubility and at least one lipophilic amino acid derivative. Among the compounds of low solubility that are especially included are aminophenol derivatives, salicylic acid derivatives, 2-amino-4-alkylaminopyrimidine 3-oxide derivatives and DHEA, and also its chemical or metabolic derivatives and precursors.

Abstract: The present invention relates to a foaming composition suitable for topical application, containing fibers and a surfactant system such that at least one direct hexaganol or cubic paracrystalline phase appears when the temperature increases beyond 30° C., where this paracrystalline phase remains present up to at least 45° C. The surfactant system preferably contains at least one water-soluble surfactant and at least one surfactant which is insoluble in water. It preferably contains at least one water-soluble soap. The invention compositions may be present in the form of creams and they have a good physical stability at ambient temperature and even up to at least 45° C. They can be especially used in the cosmetic or dermatological fields, as products for cleansing or for removing make-up from the skin, the scalp and/or the hair, etc.

Abstract: This invention relates to a composition containing, at least one DHEA compound and a liposoluble UV filter. The liposoluble UV filter is believed to make it possible to prevent or delay crystallization of the DHEA compound. The invention further relates to cosmetic and dermatological uses of this composition, in particular to prevent or treat chronological or actinic cutaneous aging.

Abstract: A composition containing at least one lipophilic sunscreen and at least one bicyclic aromatic compound represented by formula (I): or a salt or chiral analogue of such a compound, where the structural variables R1, Ar, X, R2 Y and X are defined herein, and at least one lipophilic sunscreen.

Abstract: A composition comprising, in a physiologically acceptable medium, at least one sapogenin and a solubilizing system comprising: (a) at least one non-emulsifying ester of a fatty acid and/or of a fatty alcohol whose hydrocarbon-based chain contains at least 8 carbon atoms, or a plant oil, and (b) at least one branched fatty alcohol whose hydrocarbon-based chain contains at least 8 carbon atoms and/or at least one lipophilic UV screening agent. The solubilizing system according to the invention makes it possible to dissolve a sufficient amount of sapogenin, without recrystallization, for a period of time which is acceptable for cosmetic or dermatological use.

Abstract: A composition comprising, in a physiologically acceptable medium, at least one sapogenin and a solubilizing system comprising: (a) at least one non-emulsifying ester of a fatty acid and/or of a fatty alcohol whose hydrocarbon-based chain contains at least 8 carbon atoms, or a plant oil, and (b) at least one branched fatty alcohol whose hydrocarbon-based chain contains at least 8 carbon atoms and/or at least one lipophilic UV screening agent. The solubilizing system according to the invention makes it possible to dissolve a sufficient amount of sapogenin, without recrystallization, for a period of time which is acceptable for cosmetic or dermatological use.

Abstract: A composition in the form of a water/oil/water triple emulsion comprising an outer aqueous phase and an oily phase constituting, with an inner aqueous phase, a W/O primary emulsion, the outer aqueous phase comprising, in combination, an emulsifying copolymer of carboxylic acid with a fatty chain, and a crosslinked poly(acrylamidomethylpropane-sulfonic acid). The emulsion remains stable, even in the presence of an acidic active agent, and is particularly appropriate as vehicle for water-sensitive and/or oxygen-sensitive active agents, in particular in a cosmetic or dermatological composition. The active agent can be, in particular, a vitamin, such as ascorbic acid or retinol, an enzyme and an .alpha.- or .beta.-hydroxy acid. The emulsion obtained can constitute, in particular, a composition for cleaning and/or treating and/or protecting the skin and/or mucous membranes and/or keratinous fibers.