植物抽出物の含水溶液に含まれるピセアタンノールの安定化方法、及び、植物抽出物の含水溶液

摘要

PROBLEM TO BE SOLVED: To provide a method of stabilizing piceatannol included in a water-containing solution of a plant extract, and the water-containing solution of the plant extract.SOLUTION: The method of stabilizing piceatannol included in a water-containing solution of a plant extract (excluding grape (Vitaceae) extract includes a step of controlling pH of the solution at 3.0-4.5.