The cosmetic or dermatological formulations of the invention include: (a) at least one oxidation-sensitive or UV-sensitive active ingredient, (b) at least one dialkyl naphthalate which is distinguished by the structural formula ##STR00001## in which R.sup.1 and R.sup.2, independently of one another, are chosen from the group of branched and unbranched alkyl groups having 6 to 24 carbon atoms, and (c) at least one wax and/or one oil thickener. The present invention also includes methods of using the cosmetic or dermatological formulations.