ain areas located in south of Qin Mountain, and west mountain areas in Hubei province are the principle place of production for high quality konjac . Konjac was officially listed on the catalog of new source of foods as a common food in document No.9 issued by China Health Minister on February 16 in 1998.
In America,konjac was approved by FDA as a food additive and was published in No.4 edition of Food Chemical Codex (FCC) in 1997,quality standard of konjac extracted powder was also