The main active ingredient of Grifola frondosa is preteoglycanj,mainly in the form of dextran with basic structure of -(16) and-(13) dextran, and small amount of xylose and mannose.
Reasearches revealed Grifola frondosa polysaccharide plays its anti-tumor role via enhancing cellular immunity.On the genetic level,it has powerful inhibition of mutation caused by chemicals It can be used in the comprehensive treatment of lassitude,leukocytopenia ,and reduced immunity due to chronic hepatitis and radio-chemotherapy for malignant tumors.It also has certain preventive role for AIDS.Oral intake of Grifola frondosa polysaccharide is both safe and effective.