Hello, you need to drink boiled water according to your physical condition, but if you exercise vigorously, sweat a lot and consume a lot of calories, you should add a little salt and sugar, that is, drink some water with sugar and salt, but don't drink carbonated drinks, which is very bad for your health and will cause a lot of calcium loss in your body. I hope you can choose according to your own situation. I wish you success in losing weight!