University of the Ryukyus

Okinawa Research Center Co., Ltd.

Kosuke Sueyoshi

Je-Tae Woo

Toshiaki Teruya

Yuto Teruya

Kozue Sasaki

Aki Yamano

Miki Yamada

An objective of the present invention is to provide a method for producing a nepodin-containing extract containing a high concentration of nepodin with less contaminants present therein thereby being able to be readily carried out on an industrial scale, when compared to the conventional techniques. The objective is solved by A method for producing a nepodin-containingplant extract, the method comprising the following steps (1) to (5): (1) a step of subjecting aplant to an extraction treatment using a nepodin-dissolving solvent to obtain a crudeplant extract; (2) a step of subjecting the crudeplant extract to a water-adding treatment and/or concentration treatment to obtain a solid crudeplant extract; (3) a step of subjecting the solid crudeplant extract to a weak alkali treatment to obtain a weak alkali insoluble product; (4) a step of subjecting the weak alkali insoluble product to a strong alkali treatment to obtain a strong alkali soluble product; and (5) a step of subjecting the strong alkali soluble product to a neutralization treatment to obtain the nepodin-containingplant extract.

Method of producing high-nepodin-containing rumex plant extract and high-nepodin-containing rumex plant extract

Growing community of inventors

Okinawa, Japan

Kosuke Sueyoshi