| abstract |
Provided is an oral preparation, food or drink, feed, food additive or feed additive for the prevention or treatment of the dry state of the skin associated with atopic dermatitis, xeroderma, rough hand, rough skin and the like. According to the invention, hydroxyproline or an N-acylated derivative of hydroxyproline, in particular an N-acetylated derivative, an N-propionylated derivative, an N-butyrylated derivative or an isobutyrylated derivative, or a salt thereof is contained as an active ingredient. An oral preparation for preventing or treating skin dryness, food and drink, feed, food additive or feed additive can be provided. |