PROBLEM TO BE SOLVED: To provide pharmaceuticals, quasi drugs, food products, and feed having agility improvement action and a high level of safety and materials which can be blended therewith.SOLUTION: An agility improvement agent comprises milk fat globule membrane as an active ingredient.【課題】敏捷性改善作用を有し、且つ安全性が高い医薬品、医薬部外品、食品、飼料及びそれらに配合可能な素材を提供する。【解決手段】乳脂肪球皮膜を有効成分とする。【選択図】なし