Provided is a novel composition that acts to inhibit and/or ameliorate wrinkle formation, does not have adverse effects like those of retinoids, and is highly photostable. An oral composition for reducing wrinkle formation and an oral composition for preventing wrinkle formation are provided, said compositions containing at least one compound selected from a group comprising D-glutamic acid and derivatives and/or salts thereof. Also provided are a pharmaceutical composition and a food composition containing the aforementioned oral composition for reducing wrinkle formation or the aforementioned oral composition for preventing wrinkle formation.
