Disclosed is the use of UV absorbers selected from(a) hydroxyphenyl triazines of formulain whichR, Rand Rindependently of one another, are C-Calkyl； and(a) benzotriazole derivatives of formulawhereinRis a random statistical mixture of at least three isomeric branched secondary alkyl groups each having 8 to 30 carbon atoms and having the formulaEis a straight-chain C-Calkyl；Eis a straight-chain C-Calkyl； wherein the total number of carbon atoms in Eplus Eis from 7 to 29； andRis C-Calkyl；for stabilizing cosmetic compositions against photodegradation comprising(b)symmetrical triazine derivatives of formulawhereinA is a radical of formulaRand Rindependently from each other are hydrogen； C-Calkyl； or C-Caryl；R, Rand Rindependently from each other are hydrogen； or a radical of formulawherein, in formula (3a), at least one of the radicals R, Rand Rare a radical of formula (3c)；R, R, Rand Rindependently from each other are hydrogen； hydroxy； halogen； C-Calkyl； C-Calkoxy； C-Caryl； biphenylyl； C-Caryloxy； C-Calkylthio； carboxy； -COOM； C-C-alkylcarboxyl； aminocarbonyl； mono- or di-C-Calkylamino； C-Cacylamino； or -COOH；M is an alkali metal ion；x is 1 or 2； andy is a number from 2 to 10；and a UV-absorber selected from(c) cinnamic acid derivatives； and(c) dibenzoylmethane derivatives.
