Any weight-loss product is fake, so we should reduce weight reasonably through proper meals and exercise. In fact, its principle is to apply hot compress to the abdomen and permeate through the navel to control the intestinal absorption function. It seems that the abdomen is small, but the essence is liquefied fat. Liquid free fat will only enter the blood and pipeline, and the intestine is absorbent and cannot be reversed back to the intestine. Energy is conserved, it will not decrease or increase, and it will only change from one form to another, but the overall energy will remain the same. Fat is an energy substance, which cannot be directly excreted by any means. It is nonsense to say that fat is excreted from intestines, lymph and blood vessels. The only way to decompose fat in the body is to carry out a series of chemical reactions, and finally decompose it into carbon dioxide+water +ATP, which is provided for cells to use. Fat can't and won't be discharged directly through any way.