You need to have strong willpower, control your diet and always count your calories. People do nothing all day, and the resting heat is about 1500 calories. Plus the necessary exercise, at least about 2000 calories are needed. This means that you need to eat less than 2000 calories for three meals a day and stay hungry, but it is very difficult, really difficult. For example, 100 grams of pure noodles, that is, two pairs of noodles, contain 300 calories, and a bowl of beef noodles (excluding beef) should have at least 600 calories, and the sauce with some seasonings should have more than 800 calories. That is to say, even if you only eat two bowls of noodles three times a day, it is almost over. And this hunger can easily lead to physical problems, such as hypoglycemia. Once there is a physical problem, it can't be remedied by eating more. Therefore, if you want to simply control your diet and lose weight, you need a strong will and a healthy body, and the price may be gastrointestinal diseases or a decline in the overall health level of your body. In addition, it should be noted that if people are hungry for a long time and the body will adjust, then the basal metabolism will decline, and then the resting state consumption may be reduced to 1200 calories, or even less, which is a vicious circle.