The core idea is to control diet and eat according to certain rules and proportions in order to achieve the purpose of losing weight.

It is generally suggested that healthy foods such as high fiber, low carbohydrate and low fat should be gradually introduced in the process of losing weight, and at the same time, the amount of food eaten and the interval between meals should be properly controlled so that the body can gradually adapt to the normal eating pattern to maintain the weight loss effect and health.