Most of konjac flour is low in calories, because konjac flour cannot be absorbed by human body, so konjac flour itself has no calories. The dietary fiber represented by konjac is actually a kind of carbohydrate, but because the molecules are relatively large, the digestive enzymes of the human body can not be disassembled and absorbed by the small intestine, so it does not produce heat.

Dietary fiber can safely reach the large intestine through the small intestine, increase the volume and moisture of feces, and can also be used as food for various microorganisms in the large intestine. Although it can't be digested, dietary fiber is also an essential nutrient for human body and one of the seven nutrients needed by human body.

The calorie level of konjac flour mainly depends on the amount of refined konjac flour. If it is high-purity refined konjac powder, the heat is close to zero. However, in order to balance the taste and cost, ordinary merchants often do not use pure refined konjac powder to make konjac powder, but add some other powders, such as potato starch, wheat flour, soybean flour and so on. It is possible that the specific heat depends on the proportion of various powders.