Overweight rate and obesity rate is rising year by year, we all know that weight loss is not an easy task, especially in the process of weight loss, due to the eagerness to lose weight is easy to be brainwashed by bad product advertising, or the pursuit of low prices and choose some ineffective or even dangerous to health and even life of the diet pills. Weight loss pills, as they are often called, involve two categories of drugs and health products. They usually work on four principles: 1, reduce appetite: these drugs usually contain appetite suppressants, such as sibutramine, which act on the central nervous system to produce the feeling of satiety and suppress appetite. 2, increase excretion: these drugs usually contain diuretics, laxatives and other ingredients, by increasing excretion to reduce weight. But what is excreted is basically water. 3, increase consumption: this type of diet pills usually contain hormones, through the increase in consumption to achieve the purpose of weight loss. 4, reduce absorption: this type of diet pills mainly include orlistat, etc., they let the fat is not absorbed, so as to reduce weight. The biggest problem with diet pills is even more its side effects: a. Poor appetite If your appetite becomes poor and you can’t eat, accompanied by symptoms such as increased blood pressure, headache, dry mouth, constipation and insomnia, it is likely that you have taken diet pills containing appetite suppressants. In 2010, the former State Food and Drug Administration requested to stop the production, sale and use of more than ten kinds of diet pills are included in this list. Such diet pills are not suitable for people with high blood pressure, heart disease, and frequent insomnia. Second, the oil stool always feel uncomfortable in the stomach, always want to go to the toilet, a day will have to stool two or three times, there is a layer of oil in the stool, may be taking a diet pills to inhibit the absorption of fat in the intestines. These drugs cause irregular oil excretion from the body, and about 1/3 of the fat is excreted from the intestines. The side effects are gastrointestinal discomfort, such as flatulence, abdominal pain, and oil in the stool. People with gastrointestinal diseases and gastrointestinal surgery should use caution. Third, panic and hand trembling Feeling a sudden nervousness and enhanced excitement, a rise in blood pressure, emotional instability, palpitations, sweating, hand trembling and other symptoms, it may be that the diet pills contain laxatives and diuretics, etc.. During this period, it is best not to drive and not to engage in dangerous work. Fourth, irritability There are also some illegal diet pills on the market that incorporate prohibited ingredients, such as amphetamines and ephedrine. Taking such drugs can lead to emotional instability, irritability, paranoia, hallucinations, insomnia and other symptoms, and their potential danger is higher than the therapeutic effect of weight loss.