Drinking water is a good choice. You can wash your stomach. You can drink about 300ml of water after brushing your teeth in the morning. The exact amount is uncertain. Then, you can divide three portions of water between 8: 00 and 12: 00, especially when you are about to eat at noon. This can reduce your appetite. Don't sit down and rest immediately after eating. After lunch, stand for a while and drink a glass of water. You can lose weight. Get up and drink water after a nap.