Why is Konjac So expensive

a plant which is mainly growing in Asian countries and has high requirements on climate, soil and other growing environments. This means not everywhere is suitable for growing Konjac plants. Here in China, Konjac is mainly growing in mountainous areas such as Sichuan, Yunnan and Guizhou Province.  Due to regional,climate and soil restrictions, konjac cultivation is more difficult than wheat cultivation, and the yield is also easily affected by weather, diseases and insect pests. So overall, the yield of konjac is low, making its raw materials more expensive than wheat.The edible part of konjac is the tuber with a water content of 78 to 89%, and its main component is glucomannan (GM), a kind of water soluble dietary fiber.  But we can't eat the Konjac yam directly, we need to do a lot of intensive processing before we can use konjac powder and process it into various different konjac foods.