The present invention relates to a cosmetic for reducing skin wrinkles and, more specifically, to an antiaging cosmetic containing a nanoparticle soluble product obtained by solubilizing and micellizing, with an amphiphilic polymer, oleanolic acid, which is effective for reducing skin wrinkles but is poorly soluble, thereby increasing the solubility thereof in water, which is a solvent contained in cosmetics, and improving skin penetration.
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