Provided is a stable and safe oral composition that acts on the barrier function of the skin for alleviating and/or preventing rough skin. An oral composition for alleviating rough skin and an oral composition for preventing rough skin are provided, the compositions containing at least one compound selected from the group consisting of D-glutamic acid and derivatives and/or salts thereof. Also provided are a pharmaceutical composition and/or a food composition containing the oral composition for alleviating rough skin or the oral composition for preventing rough skin.
