Research Progress on Pharmacological Activity and Preparation Methods of Ginsenoside Rd

As a main active monomer in ginseng,protopanaxadiol type saponin Rd had cardiovascular system protection,nervous system protection,anti-aging and anti tumor effects.As lower content of ginsenoside Rd in ginseng,it was difficult to extract ginsenoside Rd from gingseng root directly.Rare ginsenoside Rd by transforming glucosyl in high content ginsenoside,including chemical conversion method and biotransformation method were obtained.In order to provide a theoretical basis for the application of ginsenoside Rd,the pharmacological effects and preparation methods of ginsenoside Rd were summarized.