The main objective of intermittent fasting is not only to restrict calorie intake to lose weight but to divert its attention on things other than digestion like recovery and maintenance. When you fast, the body basically goes into the starvation mode and a series of metabolic changes take place. During this time, the body enters into ketosis, a state in which fat is used for energy when carbohydrates are unavailable.
While fasting, it is crucial to stay hydrated and as you cannot get water from vegetables and fruits, you have to depend on beverages for that. But you need to be careful about the kind of beverage you choose to have. Drinks loaded with carbs or sugar can cause your body to secrete the hormone insulin and you can easily miss out on the benefits of intermittent fasting.