Use of at least one compound of the formula la, Ib, Ic or Id where R 2 to R 6 and R 9 to R 13 are each selected, independently of one another, from H, OH, straight-chain or branched C 1 - to C 20 -alkoxy groups, where the alkyl chains may each also be interrupted by oxygen or nitrogen, straight-chain or branched C 1 - to C 20 -alkyl groups, where the alkyl chains may each also be interrupted by oxygen or nitrogen, straight-chain or branched C 3 - to C 20 -alkenyl groups, straight-chain or branched C 1 - to C 20 -hydroxyalkyl groups, where the hydroxyl group may be bonded to a primary or secondary carbon atom of the chain and furthermore the alkyl chains may each also be interrupted by oxygen or nitrogen, straight-chain or branched C 1 - to C 20 -hydroxyalkoxy groups, where the hydroxyl group(s) may be bonded to primary or secondary carbon atoms of the chain and furthermore the alkyl chain may also be interrupted by oxygen, straight-chain or branched C 1 - to C 20 -alkylamino groups, straight-chain or branched C 1 - to C 20 -dialkylamino groups, or R 2 to R 6 and R 9 to R 13 each stand, independently of one another, for a carboxylic acid, phosphoric acid, sulfonic acid, sulfuric acid or sulfone function, which may optionally be esterified or alkylated by means of straight-chain or branched C 1 - to C 20 -alkyl groups or straight-chain or branched C 3 - to C 20 -alkenyl groups, or salts of the compounds of the formulae la to Id, as antioxidant for the preparation of cosmetic or pharmaceutical, in particular dermatological compositions or of foods or food supplements or for the preparation of household products. R 2 to R 6 and R 9 to R 13 are each selected, independently of one another, from H, OH, straight-chain or branched C 1 - to C 20 -alkoxy groups, where the alkyl chains may each also be interrupted by oxygen or nitrogen, straight-chain or branched C 1 - to C 20 -alkyl groups, where the alkyl chains may each also be interrupted by oxygen or nitrogen, straight-chain or branched C 3 - to C 20 -alkenyl groups, straight-chain or branched C 1 - to C 20 -hydroxyalkyl groups, where the hydroxyl group may be bonded to a primary or secondary carbon atom of the chain and furthermore the alkyl chains may each also be interrupted by oxygen or nitrogen, straight-chain or branched C 1 - to C 20 -hydroxyalkoxy groups, where the hydroxyl group(s) may be bonded to primary or secondary carbon atoms of the chain and furthermore the alkyl chain may also be interrupted by oxygen, straight-chain or branched C 1 - to C 20 -alkylamino groups, straight-chain or branched C 1 - to C 20 -dialkylamino groups, or R 2 to R 6 and R 9 to R 13 each stand, independently of one another, for a carboxylic acid, phosphoric acid, sulfonic acid, sulfuric acid or sulfone function, which may optionally be esterified or alkylated by means of straight-chain or branched C 1 - to C 20 -alkyl groups or straight-chain or branched C 3 - to C 20 -alkenyl groups, or salts of the compounds of the formulae la to Id, as antioxidant for the preparation of cosmetic or pharmaceutical, in particular dermatological compositions or of foods or food supplements or for the preparation of household products.