Composition, especially cosmetic, comprising 7-hydroxy dhea and / or 7-ceto dhea and at least one no-synthase inhibitor

The invention concerns a composition comprising, in a physiologically acceptable medium: (a) at least a DHEA derivative selected among 7-hydroxy DHEA and 7-keto DHEA, and (b) at least a NO-synthase inhibitor. The inventive composition is for oral or topical administration. It can be used for cosmetic purposes, to prevent or treat skin irritation and/or sensitive skins and/or for skin ageing symptoms. The NO-synthase inhibitor can be selected among lipochroman-6, a grape, olive tree or gingko biloba or epicatechin extract.