PROBLEM TO BE SOLVED: To provide pharmaceuticals, quasi drugs, food, and feed that have atrogin-1 and MuRF1 expression inhibitory actions and exhibit muscular atrophy inhibitory effects, and a material that exhibits the effects when blended in pharmaceuticals, food and the like.SOLUTION: A muscular atrophy inhibitor contains Sophora japonica LINNE extract as an active ingredient.SELECTED DRAWING: NoneCOPYRIGHT: (C)2018,JPO&INPIT【課題】アトロジン-1及びMuRF1発現抑制作用を有し、筋萎縮抑制効果を発揮する医薬品、医薬部外品、食品、飼料、及び医薬品や食品等に配合した場合に当該効果を発揮する素材の提供。【解決手段】エンジュ抽出物を有効成分とする筋萎縮抑制剤。【選択図】なし