PROBLEM TO BE SOLVED: To provide a method for producing an extract of red shiso (red perilla) leaves with which, from red shiso leaves to which an acid has been added, rosmarinic acid contained therein can be collected at a high yield.SOLUTION: This method for producing an extract of red shiso (red perilla) leaves comprises the following step (1). Step (1): Extraction from red shiso leaves to which an acid has been added using water at a pH of 4.0 to 8.0.SELECTED DRAWING: NoneCOPYRIGHT: (C)2020,JPO&INPIT【課題】酸が添加された赤シソ葉から、それに含まれるロズマリン酸を高い収率で回収することのできる赤シソ葉抽出物の製造方法の提供。【解決手段】下記の工程（１）を含む、赤シソ葉抽出物の製造方法。（１）酸が添加された赤シソ葉を、ｐＨ４．０～８．０の条件下に水で抽出する工程【選択図】なし
