Look at the batch number: diet pills belong to the category of drugs, and the batch number of drug supervision must be obtained. If there is no batch number, it is a fake batch number or food batch number instead, which is a fake and shoddy product with problems. Look at the instructions: regular diet pills have professional instructions, and the instructions will also explain the usage and taboos in detail. If the diet pills you bought don't exist, they are probably shoddy. See the curative effect: some diet pills will make people feel very excited and even shake their hands after taking them for a long time. This is actually adding lean meat essence, which is extremely harmful to the heart. Although the effect of losing weight is very rapid, it will be life-threatening. You can't keep trying. Look at the ingredients: some diet pills contain diuretics, laxatives, nerve inhibitors and so on. It is very unsafe for the human body. Even if you can use it for a while and use it in an emergency, you will buy a huge hidden danger, so it is best not to take diet pills, and exercise is the healthiest way to lose weight.