Now everyone in order to lose weight can be said to be the tricks, exercise diet these not to mention, what sweat, moxibustion, Pian Gu are out, and even some unheard of methods. These methods are not effective to say, but there are definitely new ideas. However, before the test of time, the users of these biased types of weight loss methods are not very widespread and only belong to a niche market. Among all the weight loss methods now, the most used in addition to exercise and dieting, to count on drugs to lose weight. Compared to exercise and dieting, the advantage of medication is that it is not as tiring as exercise and does not require a deliberate struggle with food, so it is favored by those who are weak-willed dieters. Businesses are also looking at this to create a wide variety of diet pills, and are trying to enhance the effect of weight loss to increase sales. But if weight loss is really so easy, who will be tired to exercise, painful dieting? In fact, the reason why weight loss pills can achieve the purpose of weight loss is only through two principles. The first is to reduce intake, including appetite suppression, reduce absorption efficiency and other ways, so that the body can not get enough energy from the outside as before, in order to maintain basic life activities, it has to start consuming body fat, so as to achieve the purpose of weight loss. For now, the typical drug in this category is orlistat. Orlistat is designed to reduce absorption by inhibiting the enzymes that break down fat in the gut, so that the body cannot properly absorb the fat eaten by the user. The disadvantage of this drug is that it is not efficient in weight loss, if the user does not consume fat when eating or consume less, then it is equivalent to no effect. But its disadvantage is also its advantage. Because of this principle of action, it rarely enters the blood circulation and does not cause too many side effects on the body. Because of this, orlistat is the only over-the-counter weight loss drug. In terms of reducing intake, in addition to the gastrointestinal orlistat, there are many appetite suppressants that act on the nerve center. For example, phentermine, which affects neurotransmission by altering the secretion of specific hormones to suppress appetite. However, these drugs may cause psychiatric disorders, belong to the prescription drugs, the use of more cautious. The second principle of action of weight loss pills is to speed up the body’s metabolism and increase the body’s consumption so as to play the effect of weight loss. This way is relatively less used than the previous one, and most of them will still be supplemented by the appetite suppressant effect together. And this type of drug is prone to cardiovascular disease, the potential threat is relatively large. Weight loss drugs are used to achieve weight loss by changing the normal function of the body, so there will be some side effects. So far, the world has not found a drug that can effectively lose weight without side effects. If conditions allow, you should still go for those healthier weight loss methods. It is impossible to lose weight without paying for it, and the desire for a quick fix can only lay a bigger hole for the future.