Many diet pills are like that, which excites your central nervous system, keeps you awake and suppresses your appetite. Finally it turns yellow, which makes you look unhealthy. The most terrible thing is that once you stop taking drugs and resume your diet, you will rebound. I bought diet pills before, and my heart beat faster just after taking them. Can't sleep at night. I dare not take it for two days. I am a medical student myself. Think about these side effects, which affect my health too much. I still advise you not to eat dinner. The effect is very good. It is also good to drink a cup of low-fat milk or sugar-free soybean milk for dinner, or eat some kiwi fruit and oranges. Very healthy, and the skin is tender.