PROBLEM TO BE SOLVED: To provide an emulsifier derived from a natural product, excellent in biosafety as a compounding agent for a cosmetic, a quasi drug, food or the like, and having excellent emulsification ability and emulsion stability.SOLUTION: An emulsifier containing a substance obtained by reducing molecules of starch by processing, for example, starch or a plant containing starch by microorganism or enzyme selected from some one or more kinds of lactic acid bacteria, bifidobacteria and aspelgillus, has irritation relaxation effect (prostaglandin E2 production inhibitory effect) which is remarkably excellent in a concentration dependent manner.COPYRIGHT: (C)2015,JPO&INPIT【課題】化粧料、医薬部外品及び食品などの配合剤として、生体安全性にすぐれ、かつ、すぐれた乳化能及び乳化安定性を有する天然物由来の乳化剤を提供する。【解決手段】例えば、澱粉又は澱粉を含む植物を、乳酸菌、ビフィズス菌、及び麹菌のいずれか1種以上から選択される微生物又は酵素により処理して、澱粉を低分子化したものを含む乳化剤であって、濃度依存的に格段にすぐれた刺激緩和効果(プロスタグランジンE2生成抑制効果)を有する。【選択図】図1
