According to the principle of action, diet pills can be divided into three categories:

Central appetite inhibitor 1 enters the brain through the blood, acts on the appetite center in the hypothalamus of the brain, and reduces the desire for food.

2. Inhibit the absorption of nutrients and act on the gastrointestinal tract. It will reduce or delay the absorption of nutrients and energy elements by the human body.

3. agonists of GLP-1receptor, such as liraglutide, can inhibit gastric emptying and increase basal metabolic rate. Although this medicine can lose weight, its indication is diabetes.