It is not necessary to take Orlistat if you do not eat. Orlistat can inactivate the lipase enzyme in the digestive tract, fat is not absorbed in the body, and the undigested and absorbed fat will be excreted from the digestive tract to achieve the effect of reducing calorie intake and controlling body weight. If the meal was not eaten or eaten fat-free food, there is no need to take Orlistat. People during weight loss should be careful to eat a balanced diet, food should be rich in fruits and vegetables, and every meal should have fat, protein and carbohydrates. While using drugs to reduce weight should combine their own conditions to develop a reasonable fitness program, maintain a certain amount of daily exercise, so that the weight of a healthy, smooth decline.