Freund Industrial Co., Ltd.

Japan Greenwave Ltd.

Yukihiro Saito

Seiichi Umeda

Naomi Yoshida

Shimesu Motoyama, Deceased

An aqueous solution containing a high concentration of ginkgo leaf extract having good preservability is prepared. The aqueous solution containing ginkgo leaf extract comprises at least 1 weight % of a hydrous organic solvent extract obtained from ginkgo leaf, and further disaccharide alcohols and/or trisaccharide alcohols, and/or organic compounds having a basic nitrogen atom in the molecule and a solubility in water at normal temperature of at least 10 g/100 ml.

Aqueous solution containing ginkgo leaf extract

A composition containing an extract obtained by a water-containing organic solvent, comprising: (a) an extract containing active ingredients including flavone glycoside or biflavone almost insoluble in water, said extract being obtained for ginkgo plant tissues by extraction with a water-containing organic solvent, and at least one of (b) a water-soluble high-molecular substance and (c) a fatty acid ester of polyglycerol. This composition can be formulated into preparations not containing ethanol, i.e. solid preparations including tablets, granules, and powder preparations, or non-alcoholic liquid preparations such as drinkable preparations and syrups, in such a way that the extract contained is well absorbed through the digestive tract.

Growing community of inventors

Ohmiya, Japan

Yukihiro Saito