Composition, in particular cosmetic, containing the 7-hydroxy DHEA and / or 7-keto-DHEA and at least one vitamin and / or an enzyme co-factor

The invention concerns a composition containing, 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 vitamin selected among vitamins B2, B3, B5, B6, B12, C, D, H, I or K and/or at least a precursor of such a vitamin and/or at least an enzymatic cofactor. The invention also concerns cosmetic and dermatological uses of said composition in particular for preventing or treating skin ageing symptoms.