During a 24-hour fast, it’s important to drink plenty of water—more than your usual 8 glasses. You won’t be ingesting any water from food during this time, and your body needs water to function.

Many people aim to drink more than 8 cups (2 L ... consider limiting your fast periods to 24 hours or fewer and keeping a snack on hand in case you start to feel faint or ill.

Fasting simply means to abstain from food or drink for a period of time - though water and zero-calorie beverages such as tea ...

How you go about fasting is up to you, but those following the 16:8 method will typically only drink water during their 16-hour fast while others will make exceptions for sugar-free beverages ...