PROBLEM TO BE SOLVED: To provide a preadipocyte differentiation inhibitor that is effective and highly safe, and foods and drinks, medicines, supplements, and cosmetics that exhibit the effect of inhibiting the differentiation of preadipocytes.SOLUTION: The present invention provides a preadipocyte differentiation inhibitor containing urolithins.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2018,JPO&INPIT【課題】効果的で安全性の高い前駆脂肪細胞分化抑制剤、ならびに、前駆脂肪細胞の分化抑制効果を奏する飲食品、医薬、サプリメント、化粧料の提供。【解決手段】ウロリチン類を含有する前駆脂肪細胞分化抑制剤。【選択図】図1