This question should probably be answered by people who have taken weight loss pills, but their answers must be inconsistent. Some people do lose weight by taking weight loss pills, and some people are completely ineffective, why?

　　The reason lies in the mechanism of action of diet pills. At present, the active ingredient of more mainstream weight loss drugs (such as Qumei, Aoqu, Kexiu, etc.) is sibutramine. Its weight loss principle is to act on the brain, enhance satiety, reduce hunger, suppress appetite, and reduce eating. Reduced energy intake, thereby reducing weight-but if you take this medicine, the appetite is not suppressed, what you eat now and what you eat, there is no reduction in eating, energy intake is not reduced, of course, it is not helpful for weight loss, that is, weight loss pills Does not work for you.

　　 People are often obsessed with various weight loss methods, ignoring the root of effective weight loss: making energy intake less than energy consumption. According to Newton''s law of thermodynamics, only when energy intake is less than energy consumption, body fat will be metabolized into energy use, and only through this route (except surgery), fat can be reduced.

　　 There is also a commonly used weight loss drug is orlistat (trade name Xenical), its mechanism of action is to inhibit lipase digestion of fat in the intestine, directly prevent fat absorption, and make part of the fat ( 30%) Excreted with feces (I have seen a serious media report that men should also use sanitary napkins when using this medicine to prevent unabsorbed oil from flowing out from the anus, huh). This reduces energy intake and achieves weight loss. However, for those who have a relatively light diet and have little fat intake (such as many obese women), this weight loss drug that prevents fat absorption is meaningless. In short, the premise of this type of weight loss medicine is effective is that dietary fat intake is large. If you eat very little fat, or take fat at night to take the medicine the next morning, the fat has already been absorbed, the medicine has no fat to prevent, so it is not Will work.