PROBLEM TO BE SOLVED: To provide a composition that exhibits an enhanced skin-beautifying action and is suitable, for example, for pharmaceuticals, cosmetics, foods, drinks and the like.SOLUTION: The composition contains (1) a compound represented by general formula, an isomer thereof and/or a pharmacologically acceptable salt thereof and (2) a skin-beautifying component. In the formula, Ris a hydrogen atom or a 1-8C linear or branched alkyl group Ris a hydrogen atom, an unsubstituted or substituted aromatic group, or a 1-4C aliphatic hydrocarbon group substituted with an unsubstituted or substituted aromatic group Ris an unsubstituted or substituted aromatic group n is an integer of 1 or 2 and m is an integer of 0-3.
