To provide compositions in which a solid fat, such as ceramides, is stably emulsified and dispersed as fine particles without crystallization.SOLUTION: Provided is a lipid microparticle dispersion containing the following components (A) to (E), and having 3.5 or more to 8.0 or less of pH, the heat of fusion in the temperature range of 45°C or more to 80°C or less of the lipid microparticles being 0.30 J/g or less, and the mean particle diameter being less than 200 nm. (A) One or more selected from sterol and a derivative thereof； (B) lipid except the component (A) which is solid or semi-solid at 25°C； (C) anionic surfactant； (D) aqueous solvent； and (E) water.SELECTED DRAWING: None【課題】セラミド類等の固体脂を結晶化させることなく、微細な粒子として安定に乳化分散させた組成物の提供。【解決手段】次の成分（Ａ）～（Ｅ）を含有し、ｐＨが３．５以上８．０以下である脂質微粒子分散物であり、当該脂質微粒子の４５℃以上８０℃以下の温度範囲における融解熱量が０．３０Ｊ／ｇ以下であり、平均粒子径が２００ｎｍ未満である脂質微粒子分散物。（Ａ）ステロール及びその誘導体から選ばれる１種以上（Ｂ）成分（Ａ）以外の２５℃で固体又は半固体の脂質（Ｃ）アニオン性界面活性剤（Ｄ）水溶性溶媒（Ｅ）水【選択図】なし
