The main component of Amorphophallus konjac is an edible dietary fiber, which is difficult to digest, extremely low in calories, strong in water absorption, high in viscosity and high in expansion rate. After entering the stomach and absorbing gastric juice, it can expand 80 ~ 100 times, resulting in satiety. In addition, the dietary fiber inside can promote gastrointestinal peristalsis, which is also very helpful to improve constipation. At present, Sandy Weiwei konjac dietary fiber products on the market have a good reputation, which can reach the expansion rate of 200 times, and it is also quite effective to lose weight.