Fasting can definitely lose weight, but everyone loses weight in different ways, but it will definitely hurt the body and rebound badly. Generally speaking, you should lose at least ten pounds if you only drink water a month. I really don't recommend fasting to lose weight. I suggest you go on a diet and exercise to lose weight, so that your body will suffer less damage and rebound less. It is better to eat some rice at noon in the morning, and the nutrition is light and balanced. You can not eat or eat a fruit at night. Exercise will accelerate the consumption of fat and calories, help you quickly excrete metabolic wastes from your body, and make you energetic.