The cosmetic/dermatological composition as defined by claim 1, said at least one tetrahydrocurcumin compound or derivative thereof comprising a 1,7-diphenyl-3,5-heptanedione having the following structural formula (I). A topically applicable cosmetic/dermatological composition including a cosmetically/dermatologically acceptable at least one fatty phase carrier, also comprising at least one tetrahydrocurcumin compound or derivative thereof and, as a stabilizing agent therefor, a solubilizing amount of at least one oil which contains at least one amide structural unit.ΔΆ.