Preparation of ginkgo extract

(57) Abstract: The present invention relates to a novel process for preparing novel extract of Ginkgo biloba leaves. The present invention relates to a method for the concentration of one of the major lactone increases, and the production of new extracts of Ginkgo biological activity is improved. Further the method of the present invention, the flavone glycosides to-lactone ratio in the final product becomes possible controlled manner to as desired. The present invention relates to novel extracts from Ginkgo, particularly disclose those for oral administration.